No wonder she's a style icon! Sienna Miller adds her own twist to a little black dress with chunky 90s heels and messy updo

By Caitlin O'toole For Dailymail.com

Published: 19:37 EST, 26 October 2015 | Updated: 09:43 EST, 27 October 2015

It's been ten years since Sienna Miller won over the fashion pack with her bohemian sense of style.

And while she's now a bona fide member of the A list, the 33-year-old hasn't lost the quirky touch which makes her so popular.

With a messier than usual updo, and a chunky pair of 90s heels, Sienna added her own touch to an otherwise predictable little black dress. 

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Classic black: Actress Sienna Miller arrives at the Ed Sullivan Theater for The Late Show With Stephen Colbert on Monday

The mother-of-one chose a gemoetriccally patterned strappy number that showed off her slim shoulders as she headed into Stephen Cobert's studios in New York on Monday.

The dress featured a black crepey material with darker, geometrical black shapes and a sheer bodice. 

Sienna appeared to be in good spirits, smiling to fans as she arrived at the talk show to promote her new film Burnt.

The American Sniper star accessorised with a simple gold bracelet.

Promo trail: The British star is promoting her new film Burnt, which reunites her with American Sniper costar Bradley Cooper

Stylish: The actress wore her blonde hair up in a messy bun as she headed into the building

She later threw a chic camel overcoat from Rag & Bone over her minimalist gown to ward off the autumn chill.

The actress is a single mother to three-year-old daughter Marlowe, after splitting from her fiance, actor Tom Sturridge, after four years.

Sienna has been hard at work promoting her new film, which reunites her with American Sniper costar Bradley Cooper.

Elegant: Sienna stayed warm by throwing a long camel coat by Rag & Bone over her dress

Bradley plays a chef who is trying to make a comeback after a meltdown, while Sienna plays a sous-chef who must deal with his demanding style in the film, which is released on October 30.

And the pair, who immersed themselves in the world of fancy cuisine, admitted that cooking like a top chef while acting was harder than it looks.

'I now know that if you're at a table of five and someone gets up to go to the bathroom- and it takes more than five minutes - every dish gets thrown away,' Sienna told a press conference last week.

'I tell people now that they can't get up while we're waiting for food.' 

Busy: The actress greeted fans before heading into studio

And Bradley added: 'You don't know how hard it is to act and make pasta at the same time. 

'This was one of the wonderful things for all of us. We actually got to do the work a chef would do.' 

The British actress can also currently be seen in Mississippi Grind, which stars Ryan Renolds and Ben Mendelsohn as gamblers on a poker road trip. 

All smiles: Sienna appeared to be in high spirits as she smiled for onlookers

Challenge: The 27-year-old plays a sous-chef who must deal with Bradley Cooper's temper tantrums in cooking drama Burnt

Also spotted heading into the Late Show studios was actress Melissa Benoist, who looked pretty in a blue dress with a strapless lace bodice.

The 27-year-old actress stars in the new show Supergirl, which debuts tonight on CBS.

Melissa, who also was seen in Glee and the film Whiplash, flashed a big smile as she headed into Colbert's studio.

Big debut: Supergirl star Melissa Benoist looked pretty as she headed into The Late Show studios ahead of her new show's debut on CBS on Monday

She wore her brunette hair down in soft curls around her face, and cinched in her blue dress with a bold black belt.

The Texas-born actress, who wed her Glee costar Blake Jenner in March, also wore black heels that showed off her cute bicycle tattoo.

Earlier on Monday, the Texas-born actress laughed off Republican presidential candidate Jeb Bush's comments that he thought Supergirl was 'hot.'

'I heard about it,' she told CBS This Morning with a laugh. 

'You know, I don't know what to think about it,' she said, later adding she was 'glad he’s excited to watch the show.'

Lost for words: The actress earlier laughed off presidential candidate Jeb Bush's comment that Supergirl was 'hot'

Classy: The former Glee actress wore a blue dress with lace bodice and cute black heels

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