
She is known as the queen of Halloween.

And Heidi Klum may have still outdone herself at her latest celebration.

The 46-year-old German model gave her guests the shock of a lifetime as she was a gory humanoid alien on the attack while arriving at her 20th Annual Halloween Bash in New York City on Thursday.

Wow factor: Heidi Klum gave her guests the shock of a lifetime as she was an experiment gone horribly wrong while arriving at her 20th Annual Halloween Bash in New York City on Thursday

Putting on a show: Once they hit the red carpet, Heidi couldn't help but show off just how supple her rubbery suit was. She turned around to display her exposed spine and leaned forward to display her unveiled intestines, before leering with her sinister grin

She gave fans an inside look into the several hour long process as she sat in front of a glass window in an Amazon store in the Big Apple prior to the event.

All the hard work seemed to pay off as she looked absolutely horrifying while arriving in a quarantined bioharzard capsule alongside new husband Tom Kaulitz.

Earlier in the night she was documenting the costume process on social media.

Insane: The 46-year-old German model looked absolutely horrifying while arriving in a quarantined capsule

Intricate: It was definitely her most bloody, gory and over-the-top look yet

Too scary: Heidi bared her fangs while an injured Tom looked on

Heidi Klum is letting her fans see how she is getting made up for Halloween this year.

The star has a habit of dressing over-the-top for the holiday.

She took to social media as well to document the change. But even though her makeup as well underway by lunch time in Manhattan, it wasn't initially clear what her costume was.

Sweet: Heidi did her best to either kiss Tom or eat his face, though the creature was stymied by the remaings of his broken helmet

Trio: The couple were joined by Tom's identical twin brother Bill Kaulitz, who appeared to recreate Chiwetel Ejiofor's look from Maleficent: Mistress Of Evil. He also recreated the actor's dread locks.

Go time: After posing in their containment area, the blood-splattered couple held hands and ventured outside to join the rest of Heidi's Halloween guests

She said in her caption: 'I‘ll be getting ready all day at @amazon Books - 7 W 34th St in Manhattan. Come say hi! @amazonprimevideo #heidiklumhalloween #heidiklumhalloween2019.'

The star appears to be some type of green alien, but it is still too early to tell. Even when the mask was applied, her followers were stumped.

Some guessed a ghoul from Mars Attacks, Freddy Krueger, the white walker, the alien from Alien: Covenant, the creature from The Shape Of Water and Suspiria.

Mystery look: Klum is letting her fans see how she is getting made up for Halloween this year

Sharing it with everyone: On Thursday morning the supermodel sat in front of a glass window in an Amazon store in New York City so the transition from natural beauty to crazy costume could be seen in all its glory

A big backside: The cover girl grabbed her backside as professionals worked on her look

She didn't seem to mind eating standing up: The model captioned this shot, 'Pasta and prosthetics'

The mask was gruesomeness with light green skin, extra flash on the head and red cut marks over one cheek.

At one point, her husband came in to visit and she gave him a kiss which made for a weird clip. Tim Gunn also came by to check on her.

It all began before lunch when she was seen in a black robe with glasses on giving two thumbs up.

In her video, Heidi has her hair in a cap and her face looks different. She has freckles and a very large top lip almost looking a bit Kardashian.

Taking it in stages: Heidi gave her fans closer views of various specific elements of her look

Who is she? The star appears to be some type of green alien, but it is still too early to tell. Even when the mask was applied, her followers were stumped

Come on Heidi, tell us! Some guessed a ghoul from Mars Attacks, Freddy Krueger and Suspiria

Kiss from a creepy crawler: At one point, her husband came in to visit and she gave him a kiss which made for a weird clip. He seemed to have some of the mask on his nose

Heidi, stop, it's too scary! At one point she stuck her tongue out when in her mask

The day before she was seen dropping a new hint about her traditionally epic Halloween costume.

She went on social media Wednesday and fans flocked to the comments section to throw out their guesses.

The supermodel throws an over-the-top annual bash for the spooky holiday and her costumes get crazier and more elaborate every year.

The start: Heidi Klum is letting her fans see how she is getting made up for Halloween this year. On Thursday morning the supermodel sat in front of a glass window in an Amazon store in New York City so the transition from natural beauty to crazy costume could be seen in all its glory

On view: The TV vet took to social media as well to document the change. But even though her makeup as well underway by lunch time in Manhattan, it is still not clear what she will go as

A crowd: By lunch there were at least 50 people outside the window taking photos

All eyes on Klum: She said in her caption: 'I‘ll be getting ready all day at @amazon Books - 7 W 34th St in Manhattan. Come say hi! @amazonprimevideo #heidiklumhalloween #heidiklumhalloween2019'

Behind the scenes: A look at the crowd in an image posted by Klum herself

Work it: The ex of Seal was seen in a black robe with black and white boots

'Halloween is almost here,' the 46-year-old wrote on social media.

'If you are in NYC, join me tomorrow at the @amazon store at 7 West 34th Street to watch me be transformed live into a _______! (Any guesses?)'

The video she shared showed a bizarre green face with closed eyes that was modeled after her own beautiful visage.

She sure loves this stuff: She sat with a cap on her head, which covered her braids

Surprising: In her latest video, Heidi has her hair in a cap and her face looks different. She has freckles and a very large top lip almost looking a bit Kardashian

She won't take her wedding band off: The catwalk queen had her ring covered as makeup was applied to her hand

Painted lady: And her legs and feet were also seen being covered in the makeup

She sure is brave: In this image, Heidi is seen stepping into her prosthetic suit. She said she looked like a 'chicken'

Holy smokes! She then came out in the green outfit with a metal cover on her privates

Digging in: She took time to have some spaghetti take out food

A better look: Here she showed off her intestines and other gruesome features

Is this ok? She touched her fake breasts and smiled while her crew worked on her

Four on her: She had at least four people working their magic in this photo as the crowd grew

Mugging for the cameras: Heidi has revealed to People that her look is to be a 'couple's costume' with hubby Tom Kaulitz

Glowing with an almost radioactive green shade, the face is slightly misshapen and appeared to be buried in some sort of hole or tunnel the same color which will likely be removed before the party.

The camera pulls away from the nose and eyes, through the tunnel an emerges in the real world making the costume even more puzzling.

She also shared a shot of some sort of prosthetic being formed but the case gave no hits as to what was inside.

Heidi asked for guesses in her caption and her 6.7M followers were ready to throw out their ideas.

So much work it's a little crazy: Heidi is seen here on Wednesday getting a mold fit for her face

'Halloween is almost here,' the 46-year-old wrote on social media. 'If you are in NYC, join me tomorrow at the @amazon store at 7 West 34th Street to watch me be transformed live into a _______! (Any guesses?)'

Hidden figure: The face is slightly misshapen and appeared to be buried in some sort of hole or tunnel the same color that will likely be removed before the party

More to come: She also shared a shot of some sort of prosthetic being formed but the case gave no hits as to what was inside

Some of the suggestions were: The Grinch, an alien, the Terminator, a witch, a character from Mars Attacks, a zombie and a mummy.

Always one to love the big reveal, the Project Runway star didn't give any more hints as to weather any of the guesses were right.

So far all that fans know is that she and her husband Tom Kaulitz will be wearing coordinating costumes and that hers will take '10 hours' to prepare.

Spirit of the season: Heidi smiled and waved at fans as she sat in the shop window having her prosthetics applied

Laying her heart bare: Heidi was dressing as a creature whose heart was exposed by torn flesh over its chest

Open-minded: Heidi could be spotted in the makeup chair having an exposed brain added to her outfit

More hints: There seemed to be a cyborg element to Heidi's costume as the creature she was channeling had metallic bolts, gears and wiring integrated into its body

Details: A metal circlet bristling with spikes could be seen around her temples

Intricate: The outfit required a cart full of bottles that possibly contained various types of glue, while a woman standing near Heidi was blow-drying the prosthetics as they were applied

So realistic: Heidi's Instagram page also dropped some hints as to Tom's half of the couple's costume

She told People: 'His is gonna be easier [than mine this year] because last year I felt so bad for him. He had never done this before, and it was harder for him than for me because he had the big belly and the face. I’m used to it, but he was like, "Oh my god, I’m gonna die! It’s so hot!"'

She continued: 'He’s just as nuts as me, but I had to come up with something a little easier for him to wear this time around.'

The blonde bombshell underwent a body scan in August to ensure her prosthetics were perfectly customized to her svelte frame.

Once her costume was completed, Heidi and Tom posed inside a glass biohazard container.

Assistance: The creature's brain was held in place by a helmet-like metal contraption

For all to see: Heidi was embodying a creature whose spine was exposed to the elements

Tom was dressed in a chunky space suit that resembled the suits from the science fiction–horror film Alien (1979).

But rather than an unpleasant encounter with a xenomorph, the Tokio Hotel guitarist was ambushed by his wife.

His large helmet featured a broken glass visor as if the creature had broken through and gored his face.

After posing in their containment area, the blood-splattered couple held hands and ventured outside to join the rest of Heidi's Halloween guests.

Once they hit the red carpet, Heidi couldn't help but show off just how supple her rubbery suit was.

Star stature: Heidi's creature ambled about on a pair of metallic platform sandals

What a crew: A massive team were assembled to put together the labor-intensive ensemble

She turned around to display her exposed spine and leaned forward to display her unveiled intestines, before leering with her sinister grin.

The couple were joined by Tom's identical twin brother Bill Kaulitz, who appeared to re-create Chiwetel Ejiofor's look from Maleficent: Mistress Of Evil. He also re-created the actor's dreadlocks.

In the past, Klum has come dressed as an old woman, Fiona from Shrek, clones of herself, Jessica Rabbit and a Hindu Goddess to name a few.

This year marks the 20th anniversary over her annual monster-bash which was held at Cathédrale at the Moxy East Village hotel.

What will she be? Fans guess that she might be The Grinch, an alien, the Terminator, a witch, a character from Mars Attacks, a zombie or a mummy

So 2018: So far all that fans know is that she and her husband Tom Kaulitz will be wearing coordinating costumes. She told People: 'His is gonna be easier [than mine this year] because last year I felt so bad for him. He had never done this before, and it was harder for him than for me because he had the big belly and the face'

Amazing! This year marks the 20th anniversary over her annual monster-bash which will be held at Cathédrale at the Moxy East Village hotel (Pictured with her clones in 2016)

Red hot in 2015: Heidi as Jessica Rabbit at the 16th Annual Halloween Party in New York City

Though Heidi was clearly the belle of the ball, her guests did their best to show her up with their high-quality costumes.

Mariah Carey look glamorous as she arrived dressed as an '80s hair metal player with a green guitar in hand.

She showed off her taut tummy in a skimpy outfit comprised of a leather bra and leather with a small black leather jacket.

The singer was joined by her boyfriend Bryan Tanaka, who wore silvery feathered hair and a jeweled visor.

Mariah Carey look glamorous as she arrived dressed as an '80s hair metal player with a green guitar in hand. She showed off her taut tummy in a skimpy outfit comprised of a leather bra and leather with a small black leather jacket. The singer was joined by her boyfriend Bryan Tanaka, who wore silvery feathered hair and a jeweled visor

Winning looks: Mariah posing with the evening's host

Questlove hit the red carpet looking like the farmer from American Gothic, though he replaced the iconic pitchfork with his standard afro pick featuring a peace sign and a black power fist.

Neil Patrick Harris and his husband David Burtka looked uncanny as the Olsen Twins.

The two wore long blonde wigs and did their best pouts while puffing on cigarettes and wearing all-black clothing.

Ice-T and and his wife Coco Austin arrived in disparate outfits, with him dressed as one of the marauders from the Purge franchise, while she was dressed as Madonna in her gold leotard and cone bra.

Rural chic: Questlove hit the red carpet looking like the farmer from American Gothic, though he replaced the iconic pitchfork with his standard afro pick featuring a peace sign and a black power fist

Back in black: Neil Patrick Harris and his husband David Burtka looked uncanny as the Olsen Twins. The two wore long blonde wigs and did their best pouts while puffing on cigarettes and wearing all-black clothing

All crime is legal! Ice-T arrived looking like a bloody marauder from the Purge franchise, while his wife Coco Austin mimicked Madona with her gold corset and cone bra

Barbara Palvin and her boyfriend Dylan Sprouse arrived looking like a pair of fierce warriors.

She wore a thin, ripped skirt and blouse under a cream-colored fur cape and carried an white improvised knife.

Dylan carried a makeshift bow and arrow and had a red scarf tied around his head.

Elsa Hosk was a dead ringer for Natalie Portman playing a stripper in Mike Nichols' Closer. She wore a pink miniskirt with a lavender bra featuring plentiful fringe.

Her friend Martha Hunt was dressed as Milla Jovovich's character from The Fifth Element with a white crop top, decorative orange suspenders, and tangerine-colored hair.

Jonathan Van Ness looked ready for the new Cats movie in his red, white and black cat suit.

Dangerous: Barbara Palvin and her boyfriend Dylan Sprouse arrived looking like a pair of fierce warriors. She wore a thin, ripped skirt and blouse under a cream-colored fur cape and carried an white improvised knife. Dylan carried a makeshift bow and arrow and had a red scarf tied around his head

Movie fans: Elsa Hosk was a dead ringer for Natalie Portman playing a stripper in Closer. She wore a pink miniskirt with a lavender bra featuring plentiful fringe. Her friend Martha Hunt was dressed as Milla Jovovich's character from The Fifth Element with a white crop top, decorative orange suspenders, and tangerine-colored hair

Getting wiggy with it! Martha and Elsa looked phenomenal as they made their grand entrance into the party in their vibrant and quirky Halloween costumes

Working it! The Victoria's Secret models put on a stunning display as they posed together on the stairs outside the party

Meow: Jonathan Van Ness looked ready for the new Cats movie in his red, white and black cat suit.

Benito Skinner and Terrence O'Connor went even further with the camp as they mimicked Kylie and Kendall Jenner's Met Gala outfits.

Benito wore Kylie's glittering outfit with abundant lavender feathers, while Terrence rocked Kendall's outrageous flapper style with a crest of long orange feathers.

Daniela Braga looked disturbing as a svelte circus performer who was bleeding from her eyes and nose.

Model Grace Elizabeth looked like an alien or a fantastical creature in her head-to-toe body paint. She covered up with a skimpy pair of leather panties featuring criss-crossing straps that covered up her bust.

Maya Stepper and Mikkel Gregers Jensen showed off another winning couple's costume as Angelina Jolie and Billy Bob Thornton.

She wore a gray–blue T-shirt and black leather pants, while he rocked his own leather pants, a striped shirt, and a baseball cap mimicking the one Billy wore in real life when he publicly caressed Angelina's breasts.

Game recognize game: Benito Skinner and Terrence O'Connor mimicked Kylie and Kendall Jenner's Met Gala outfits. Benito wore Kylie's glittering dress with lavender feathers, while Terrence rocked Kendall's flapper style with long orange feathers

Ouch: Daniela Braga looked disturbing as a svelte circus performer who was bleeding from her eyes and nose. Model Grace Elizabeth looked like an alien or a fantastical creature in her head-to-toe body paint

Classic: Maya Stepper and Mikkel Gregers Jensen showed off a winning couple's costume as Angelina Jolie and Billy Bob Thornton. She wore a blue T-shirt and leather pants, while he rocked his own leather pants, a striped shirt, and a baseball cap mimicking the one Billy wore in real life when he publicly caressed Angelina's breasts

Charlotte D'Alessio simmered in a red sequined mini-dress and had spiky black hair to capture the look of classic cartoon Betty Boop.

Camille Kostek put on a busty display and channeled Marilyn Monroe in a figure-hugging white gown.

Georgia Fowler was dressed as Audrey Hepburn via Big Little Lies with her slinky black dress and jeweled tiara.

David Kirsch was painted up to look like Thanos from Avengers: Endgame and displayed his golden infinity gauntlet.

Halima Aden gave off her best sizzling stare as Disney's Maleficent, with long horns and a flowing black cloak.

Eric West looked fierce in a dark camouflage blazer with half his face painted as a skull.

Charlotte D'Alessio simmered in a red sequined mini-dress and had spiky black hair to capture the look of classic cartoon Betty Boop. Camille Kostek put on a busty display and channeled Marilyn Monroe in a figure-hugging white gown. Georgia Fowler was dressed as Audrey Hepburn via Big Little Lies with her slinky black dress and jeweled tiara

David Kirsch was painted up to look like Thanos from Avengers: Endgame and displayed his golden infinity gauntlet. Halima Aden gave off her best sizzling stare as Disney's Maleficent, with long horns and a flowing black cloak. Eric West looked fierce in a dark camouflage blazer with half his face painted as a skull

Brian Keys and Hunter McGrady were inspired by Disney's The Little Mermaid. He was dressed in a white uniform white blue trousers, while she wore a short green scaled skirt with a tail wagging behind her and a bright red wig.

David and Phillipe Blond, the fashion designer duo known as The Blonds, took their looks from Tim Burton's Batman Returns.

Phillipe was dressed in a makeshift catwoman suit, while David looked imposing as the caped crusader.

French model Constance Jablonski was dressed as the Joker, though she traded his red suit for a skirt.

Queer Eye's Antoni Porowski was joined by his rumored boyfriend Kevin Harrington as a pair of zombie Blockbuster employees with VHS staples like Cruel Intentions and she's all that taped to their uniforms.

Cosplay: Brian Keys and Hunter McGrady were inspired by Disney's The Little Mermaid. He was dressed in a white uniform white blue trousers, while she wore a short green scaled skirt with a tail wagging behind her and a bright red wig. David and Phillipe Blond, the fashion designer duo known as The Blonds, took their looks from Tim Burton's Batman Returns

Sexy Joker: French model Constance Jablonski was dressed as the Joker, though she traded his red suit for a skirt

Matching: Queer Eye's Antoni Porowski was joined by his rumored boyfriend Kevin Harrington as a pair of zombie Blockbuster employees with VHS staples like Cruel Intentions and she's all that taped to their uniforms

Victoria's Secret Angel Taylor Hill was painted green to play Gamora and wore a black leather top and matching slacks.

New York Giants player Golden Tate tested the bounds of good taste with his Tekashi69 costume featuring the criminal rapper's multicolored hair and 69 tattoos.

His wife Elise Tate was dressed as a leather-clad police officer in fishnet stockings.

Designer August Getty showed off his fit physique and was dressed as an angel with large white wings.

German creative director Thomas Hayo rocked an iconic John Lennon look with his shaggy hair, round-frame glasses and a white tank top reading 'New York City.'

Seeing green: Victoria's Secret Angel Taylor Hill was painted green to play Gamora and wore a black leather top and matching slacks

Odd couple: New York Giants player Golden Tate tested the bounds of good taste with his Tekashi69 costume featuring the criminal rapper's multicolored hair and 69 tattoos. His wife Elise Tate was dressed as a leather-clad police officer in fishnet stockings

Designer August Getty showed off his fit physique and was dressed as an angel with large white wings. German creative director Thomas Hayo rocked an iconic John Lennon look with his shaggy hair, round-frame glasses and a white tank top reading 'New York City'

Model Rachel Hilbert was the spitting image of Britney Spears in her iconic red latex body suit.

She was joined by fellow model Caroline Silta, who rocked a white nurse's uniform and red thigh-high boots, along with a bloody slit throat.

Reggie Bush looked stylish in a black tuxedo with floral embroidery and a Batman mask, while Lilit Avagyan Bush put on a busty display in a black dress covered up with a black blazer. She cinched a belt around he waist to highlight her extreme hourglass figure.

Rapper Slick Rick and his wife Mandy Aragones stuck to a nautical theme with their matching white sailor costumes.

Spitting image: Model Rachel Hilbert dressed as Britney Spears in her iconic red latex body suit. She was joined by fellow model Caroline Silta, who rocked a white nurse's uniform and red thigh-high boots, along with a bloody slit throat

Matching: Reggie Bush looked stylish in a black tuxedo with floral embroidery, while Lilit Avagyan Bush put on a busty display in a black dress covered up with a black blazer