Scott Disick had a photo booth at his 36th birthday party this weekend.

The TV star posed inside the booth with his 20-year-old girlfriend Sofia Richie, whose father is American Idol star Lionel Richie.

And in one of her posts the blonde model revealed her nickname for the bad boy of Keeping Up With The Kardashians: 'muffin.'

MUFFIN? Scott Disick had a photo booth at his 36th birthday party this weekend. The star posed inside with his 20-year-old girlfriend Sofia Richie. And in one of her posts she revealed her nickname for the bad boy of Keeping Up With The Kardashians. It's 'muffin'

It's love! He's 36 and she is 20 but they seem to be going stronger than ever

One of her notes read, 'Happy birthday muffin. Best night.'

She stood next to him and also put both arms around the New Jersey native who has a taste for private jets and $200,000 watches.

Also there was his 40-year-old ex-partner Kourtney Kardashian, with whom he has three children, and her siblings Kim Kardashian, 38, Khloé Kardashian, 34, and Kylie Jenner, 21.

Naughty Kylie: Also there was his 40-year-old ex-partner Kourtney Kardashian, with whom he has three children, and her siblings Kim Kardashian , 38, Khloé Kardashian, 34, and Kylie Jenner , 21

All together now: Sofia and Scott posed with his friends inside the lavish party

Doting daddy: Scott shared a photograph with his daughter Penelope

Taking to social media throughout the night, the guests documented the treats on offers for the guests, with the children treated to temporary tattoos, whilst the adults were invited to deck themselves out in Scott's clothing brand Talentless.

Khloé began by documenting the night by ribbing Scott for the enormous number of towels he kept in his bathroom, filming the inside of his restroom as she squealed: 'How many towels does the Lord have in his house?'

As Scott sauntered in clad in his Talentless outfit, he shot back, 'I've gotta stay dry, baby!' whilst Kylie quipped: 'You're exposing his bathroom!'

Khloé then forgave his perceived excesses once she spied a set of Kylie's skincare bottles on the bathroom counter, before stopping to admire herself and her mottled gray hoodie in the mirror.

Partying: Disick didn't disappoint with his latest soiree as he threw himself a lavish 36th birthday celebrations

Friendly: Kim Kardashian, 38, was at the bash as well

Tasty treats: There was plenty of food as well as drink on offer for the guests, with Sofia taking to Instagram to show off the crown shaped cookies and the mini burgers on offer at the bash

Feeling chilly? The adults were invited to deck themselves out in Scott's clothing brand Talentless, with jumpers laid out on the table for them to slip into as the evening went on

Not just for the children: Although temporary tattoos were on offer for the kids, it was Sofia and her friend who decided to adorn themselves with some glittery ink

Another clip saw all of the party guests gathered around Scott and his cake on the table, which was adorned with candles and a large '36', whilst singing Happy Birthday.

With Scott's nephew Saint West hugging his leg, the father-of-three brought up Kim and Kanye's three-year-old son to help him blow out the candles on the lavish cake.

Once they were finished, the gracious family man brought Saint along to help him blow out the candles.

The family man had invited all the family's children along to the bash, with Kim's daughter North seen showing off her floss dance moves in one sweet clip, whilst Scott's eldest child Mason also pulled off some great moves.

Scott also shares daughter Penelope, six, and son Reign, four, with Kourtney, and they too couldn't resist jigging along to the beat at the party.

Not quite as free with the music were Kim, Khloe and Kylie, who opted for a more relaxed style of dance as they swayed along to the music whilst preening down the lens for their Instagram videos.

Weird flex: Khloé began documenting the night by ribbing Scott for his huge stash of towels in his bathroom

He can be trusted: Khloé forgave his perceived excesses once she spied a set of Kylie's skincare bottles on the bathroom counter

Sidetracked: She stopped to admire her mottled gray hoodie in the mirror - which came from Scott's Talentless range

Dancing up a storm: Khloé captured the kids getting down after blowing out the cake as they showed off their moves

Main attraction: In her next video, all of the guests gathered around Scott and his cake on the table, which was adorned with candles and a large '36'

The party never ends: Scott shared a sweet picture of Kylie and Penelope in their dressing gowns chilling out in the garden after the rest of the guests had left the house

Despite their past heartbreak, Kourtney seemed to be having a great night with her ex, who she split from in 2015 after nine years of dating.

The two have continued to be committed co-parents to their three children, and while Kourtney is believed to currently be single, Scott is in a relationship with Sofia Richie.

Sofia was also at the party and gave her followers a look inside the bash, as she shared a snap of the mini burgers on offer to eat inside the bash, and revealed that she and her friend had treated themselves to getting mini temporary tattoos.

In true Kardashian-style, Scott had hired a photobooth for the bash, with the family sharing black and white snaps from the soiree.