Fans known her best as wildling Gilly in Game of Thrones.

But branching away from the hit HBO series, Hannah Murray looked worlds away from her onscreen character at the premiere of her new movie Detroit in London on Wednesday night, where she came close to suffering an unfortunate wardrobe malfunction.

The actress, 28, stunned in a plunging floral two-piece that left her bare decolletage firmly on display, yet nearly bared too much as the low-cut blazer slipped to one side.

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Careful! Stunning: Hannah Murray came dangerously close to revealing too much as she stepped out on the red carpet at the premiere of new movie Detroit in London on Wednesday

Yet undeterred by the wardrobe malfunction, the blonde beauty proved her sartorial excellence as she headed out in the capital, turning heads in her revealing monochrome attire.

It paired together a pretty and perilously low-cut blouse, that teased a look at her assets and included pretty tie-up detailing underneath the bust, with matching flared trousers.

Despite adding some height to her ensemble with a pair of patent court heels, Hannah's tailored trousers hid her fancy footwear.

Careful! The actress, 28, stunned in a plunging floral two-piece that left her bare decolletage firmly on display, yet nearly bared too much as the low-cut blazer slipped to one side

Kept in: Luckily the star's fashion tape ensured she wouldn't reveal too much

Stunning: Hannah turned heads with her glamorous ensemble

She chose to let her matching getup make a statement and forewent adding accessories to her outfit - instead teaming her look with glamorous make-up that came complete with a nude lipstick across her lips.

Hannah wore her ombre tresses in soft curls that were swept over to one side and grazed her shoulders.

Her stunning appearance was a far cry from her usual look on Game of Thrones in character as Gilly. The wildling mother is usually seen sporting a slightly unkempt figure with matted long locks and dirtied robes that hide her frame.

Gorgeous: The blonde beauty stunned in a stylish monochrome ensemble that boasted a pretty floral pattern

Risque: The top half of her two-piece made for a revealing display thanks to its perilously low-cut neckline that stole a look at her bare decolletage

Show-stopped: She looked worlds away from her onscreen character Gilly in hit HBO series Game of Thrones

Far cry! The wildling mother is usually seen sporting a slightly unkempt figure with matted long locks and dirtied robes that hide her frame

Beauty: Hannah completed her red carpet look with glamorous make-up and her blonde tresses in soft curls

Branching out: Hannah stars as Julie Ann in new movie Detroit - directed by Kathryn Bigelow

As well as appearing in the much-loved series, Hannah stars in new movie Detroit - directed by Kathryn Bigelow - as Julie Ann, who finds herself caught up in a murder that takes place at a motel she and a friend are staying in.

Detroit is based on the Algiers Motel incident that occurred in Detroit in 1967 during the racially charged 12th Street Riot - the film's release marks the 50th anniversary of the event.

Among the rioting and civil unrest, three black teenagers were killed at the motel, after a National Guardsman reported hearing shots in the area. The young men had been unarmed and were questioned and brutalized by white police officers. A further nine were badly injured.

Close by, security guard Melvin Dismukes, who is played by John Boyega in the film, overheard the same gunshot sound and headed to the motel. Caught up in the incident, he was the first to be charged in the trial that followed, but was later found not guilty.

Shocked: Speaking about her new role in the period crime drama, Hannah admitted she was left stunned by the movie's heavy storyline and felt 'physically sick' after reading the script

Speaking about her new role in the period crime drama, Hannah admitted she was left stunned by the movie's heavy storyline.

She told BANG! Showbiz at the premiere: 'I felt physically sick reading the script and afterwards as well. It was harrowing that these people went through what they did.

'It's really shocking. That's one of the reasons why Kathryn [the movie's director] wanted to do it.'

Hannah hopes the feature has “the impact it deserves”, as she believes it will open up discussions into the horrific historic events.

Hard-hitting: It recalls the riots that took place in Detroit in the late 1960s and John Boyega stars as the movie's lead

Lead: Boyega plays the role of security guard Melvin Dismukes who finds himself charged with murder after getting caught up in the events that took place during the Algiers Motel incident

Tragic: Among the rioting and civil unrest, Detriot the movie recalls how three unarmed black teenagers were killed at the motel after being brutalised by police

Fan favourite: Boyega was seen stopping for the huge crowds that had gathered to mark the release of the movie

She added: 'I hope the film has the impact that it deserves. It’s a really difficult question on how do you change people’s minds but hopefully this film will have some impact on it.

Speaking about his involvement in Detroit, meanwhile, Boyega insisted he had taken the role as he had wanted to 'challenge' himself.

'We're dealing with systematic racism. We're dealing with social unrest. We're dealing with an uprising. And these are stories that reflect until today — especially police brutality," he told The Associated Press.

Dapper: Boyega was clad in a stylish burgundy suit that he paired with a white shirt and tie underneath

High spirits: Boyega was in great spirits as he walked the red carpet

Suave: His co-star Will Poulter - who previously appeared in The Revenant - opted for a smart black suit

'I was at a point where I had done a few projects, and I wanted to challenge myself.

'When Detroit came on my radar, it felt like a godsend to obviously have this kind of project, this kind of script.'

He and Murray star in the movie alongside a star-studded cast, including Will Poulter, Algee Smith, Anthony Mackie and John Krasinski.

Powerful pair: Will was seen rubbing shoulders with Detroit's director who cut a chic figure in a white tailored suit

Suited and booted: Jack Reynor sported a charcoal grey two-piece suit, while actor Jason Maza opted for a more casual ensemble teaming together white jeans and a navy polo top

Star-studded: Detroit also features the likes of Algee Smith, Anthony Mackie and John Krasinski

Poignant role: Speaking about his involvement in Detroit, Boyega insisted he took the role as he had wanted to 'challenge' himself

He said: 'I was at a point where I had done a few projects, and I wanted to challenge myself. When Detroit came on my radar, it felt like a godsend to obviously have this kind of project, this kind of script'