From way back in 2003 Sienna Miller has been on our fashion radar. Take a look through some of her best and worst outfits of all time.
Sienna Miller is one celebrity whose style has evolved quite considerably over the years. Read on for everything about Sienna Miller's style.
Since finding fame back in 2003, the pretty actress has tried out a number of different looks. As we chart her fashion transformation, it'll become quite clear that Sienna has never been afraid to experiment with the latest looks and trends. Perhaps this explains why she's become a real style icon during her time in the spotlight.
Although she likes to update her look season after season, there's one theme that's recurring. Sienna finds boho pieces impossible to resist.
Whether she's at a muddy music festival, out running errands in New York or posing on the red carpet in LA, the slender A-lister knows floaty garments are something that she can totally pull off. She loves to complement her laid-back ensembles with fuss-free hairstyles such as halo braids and flowing, tousled waves. No discussion of Sienna's love of haute hippie styling would be complete without a mention of the beautiful full-length Gucci gown she donned for the Cannes Film Festival Closing Ceremony in 2015.
Sienna - who's starred in films including Alfie, Layer Cake and American Sniper - teamed her simple white top with a beautiful Stella McCartney skirt to step out in NYC. We're sure it's a look she'll recycle time and time again in the future - and we don't blame her.
Sienna loves to mix up hemlines - we've seen her in everything from thigh-skimming short minis to glamorous gowns featuring a long train. She's also been snapped wearing frocks with an asymmetric cut at glitzy events on a number of occasions.
Judging by the ensembles she picks, Sienna looks to have many top designers on speed dial. Sienna - who welcomed her first child with partner Tom Sturridge back in 2012 - regularly wears pieces by Chanel, Valentino and Dior.
See all the best looks and get to know Sienna Miller's style by clicking through the gallery below...
Sienna Miller
Sienna Miller wears Gucci to the Live by Night premiere in LA.
(Image credit: Rex)
Sienna Miller wears Gucci to the Live by Night premiere in LA.
Sienna Miller
Sienna Miller wearing Proenza Schouler at the Live By Night film screening in New York.
(Image credit: Rex)
Sienna Miller wearing Proenza Schouler at the Live By Night film screening in New York.
Sienna Miller
Sienna Miller at an AOL event in New York.
(Image credit: Rex)
Sienna Miller at an AOL event in New York.
Sienna Miller
Sienna Miller wears Prada spring/summer 2017 to the screening of The Lost City Of Z during the 54th New York Film Festival
(Image credit: Courtesy)
Sienna Miller wears Prada spring/summer 2017 to the screening of The Lost City Of Z during the 54th New York Film Festival
Sienna Miller
Sienna Miller
(Image credit: Beretta/Sims/REX/Shutterstock)
But first up, she's in Burberry, celebrating the launch of makeup artist Wendy Rowe's new book at a dinner in London.
Sienna Miller
Sienna Miller
(Image credit: Rex Features (Shutterstock))
Sienna looks like a Sicilian princess in this Dolce & Gabbana bodice dress from the spring/summer 2016 Italia Is Love collection. Attending The Cartier Queen's Polo Cup Final, Sienna teamed the colourful dress with her signature red lip, naturally.
Sienna Miller
Sienna Miller Burnt
(Image credit: REX)
At the premiere of her new film, Burnt, Sienna looked stunning in an asymmetric, embellished gown as she posed up a storm with Bradley Cooper on the red carpet.
Sienna Miller
Sienna Miller
Sienna Miller
Sienna Miller
Think florals are girly? Sienna's sleek city look might just change your mind.
Sienna Miller
Sienna Miller
Sienna Miller at Wimbledon 2015
Sienna Miller
Sienna Miller at Cannes Film Festival 2015
Sienna Miller at Cannes Film Festival 2015
(Image credit: Rex Features)
Sienna Miller at Cannes Film Festival 2015
Sienna Miller at Cannes Film Festival 2015: amfAR Gala
(Image credit: Rex Features)
Sienna Miller at Cannes Film Festival 2015
Sienna Miller at Cannes Film Festival 2015
(Image credit: Rex Features)
Sienna Miller at the American Sniper premiere in New York 2014
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at London Fashion Week 2014
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at Kate Moss X Topshop launch in London 2014
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at Glastonbury Festival in Somerset 2014
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at the International Medical Corps Awards in LA 2014
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at the Evening Standard Theatre Awards in London 2014
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at the American Sniper luncheon 2014 in New York
Sienna Miller style evolution
(Image credit: Rex Features)
Sienna Miller at the Golden Globe Awards 2013
Sienna Miller at the Golden Globe Awards 2013
(Image credit: Rex Features)
Sienna Miller at the BAFTA Tea Party 2013 in LA
Sienna Miller at the BAFTA Tea Party 2013 in LA
(Image credit: Rex Features)
Sienna Miller
Sienna Miller Best Dressed Of The Week
(Image credit: Rex Features)
Sienna and Savannah Miller
Sienna and Savannah Miller - 10 Best Dressed of the Week - Marie Claire - Marie Claire UK
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Savannah and Sienna Miller at London fashion week - Twenty8Twelve
(Image credit: PA Photos)
Sienna Miller
Sienna-Miller-Celebrity Photos-23 October 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-21 October 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-14 October 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Celebrity Photos - 20 August 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-07 August 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-6 August 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-05 August 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-05 August 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-04 August 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Stars Love Ankle Boots - Fashion - Marie Claire
(Image credit: Rex Features)
Sienna and Savannah Miller
Sienna and Savannah Miller - Celebrity Photos - 28 July 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Celebrity Photos - 24th July 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Celebrity Photos - 18 June 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller-Celebrity Photos-3 July 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Stars love shorts - Fashion - Marie Claire
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Celebrity Leggings - Fashion - Marie Claire
(Image credit: Rex Features)
Sienna Miller at the 2009 MTV Movie Awards
Sienna-Miller-MTV Movie Awards-Celebrity Phtotos-31 May 2009
(Image credit: Rex Features)
If there was one trend ruling the red carpet at the 2009 MTV Movie Awards, then it had to be thigh-skimming minidresses. Leading the pack was our very own Sienna Miller. Wearing a jade green glittering minidress from her Twenty8Twelve collection, the Brit actress reminded us all of her style icon status, and looked radiant with her signature blonde locks tumbling and a pair of vertiginous metallic heels elongating her picture-perfect pins.
Sienna Miller
Sienna Miller - 18 May 2009 - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - Celebrity High Street Buys - Fashion - Marie Claire
Sienna Miller
Sienna Miller-Celebrity Photos-23 April 2009
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Celebrity Photos-8 April 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - 2 Apr 2009 - Celebrity Photos
(Image credit: Rex Features)
Sienna-Miller
Sienna-Miller-Celebrity Photos-20 Feb 2009
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - 21 Feb 2009 - Oscars 2009 - Celebrity Photos
(Image credit: Rex Features)
Sienna Miller
Marie Claire Galleries: Celebrity Spy - 16 October
(Image credit: Rex features)
Sienna Miller
Sienna Miller and Keira Knightley, Celebrity Pictures, Celebrity Style Spy, Marie Claire
Sienna Miller - Edge of love - Gallery
Marie Claire celebrity photos: Edge of love premiere, Sienna Miller
Sienna Miller - Edge of Love - Gallery
Marie Claire celebrity photos: Edge of love premiere, Sienna Miller
Sienna-Miller and Kelly Osbourne-Summer Festival fashion-Celebrity Photos-29 May 2009
Sienna-Miller and Kelly Osbourne-Summer Festival fashion-Celebrity Photos-29 May 2009
Sienna Miller
Sienna Miller : Best Dressed Bafta Awards stars
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller: Best Dresses of the Decade
Sienna Miller: Best Dresses of the Decade
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller, 2007 Golden Globes
Marie Claire celebrity photos: Best Dressed Golden Globes - Sienna Miller
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller : Best Dressed Bafta Awards stars
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna-Miller-Summer Festival Fashion-Celebrity Photos-29 May 2009
Sienna Miller
Sienna Miller: 50 Best Dresses of the Decade
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Marie Claire Celebrity Photos: Style Icon Fasion Disasters
(Image credit: Rex Features)
Sienna Miller
Sienna Miller - style highs and lows - celebrity photos
(Image credit: Rex Features)
Sienna Miller
Sienna Miller
(Image credit: Rex Features (Shutterstock))
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