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Sienna Miller's style transformation, from boho to red carpet chic

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Sienna Miller exploded onto the showbiz scene in 2003 in a flurry of boho-chic outfits that quickly came to be known as her signature look. She later distanced herself from the rather limiting style genre with a series of glamour-packed red carpet gowns, and now straddles a style somewhere between the two.

See how her impulsive red carpet outfits have evolved from hippie to elegant and back again. Kind of.

  • Sienna Miller Style Evolution

    Rewind to May 2003 and Sienna Miller is everyone's favourite boho style icon.

  • Sienna Miller Style Evolution

    She truly embraced the folksy, feminine look.

  • Sienna Miller Style Evolution

    A boho style high-point thanks to this ethereal Alexander McQueen dress with silver flats at the Cold Mountain premiere in 2003.

  • Sienna Miller Style Evolution

    She flirts with a brunette up 'do at the 2004 Oscars but this strapless Matthew Williamson gown with gold armcuffs encapsulates her signature bohemian aesthetic.

    Fun fact: Sienna co-designed the emerald green and gold gown.

  • Sienna Miller Style Evolution

    Another premiere, another arm cuff. She sports a very relaxed look to the London premiere of Layer Cake in 2004.

  • Sienna Miller Style Evolution

    It's a double strapped Chloe gown for the Venice Film Festival in 2004.

  • Sienna Miller Style Evolution

    She's accessorising this floaty McQueen gown with layers of beads and a scarf in 2005.

  • Sienna Miller Style Evolution

    Now something of a Williamson muse, Sienna attends the designer's 2005 gala in one of his pink striped designs and showing off a new accessory - the gold hippy headband.

  • Sienna Miller Style Evolution

    The actress goes for a breathtaking strapless Christian Dior gown, diamond choker and slightly ruffled up'do at the premiere of Casanova in 2005.

  • Sienna Miller Style Evolution

    But boho is banished in favour of a sleek crop and sharp bustier and trousers combo at Casanova's LA premiere in 2005.

  • Sienna Miller Style Evolution

    She's more modern rock than floaty boho in a glittery Burberry mini at the Met Gala in 2006.

  • Sienna Miller Style Evolution

    Quintessential Sienna at the Factory Girl premiere in 2007.

  • Sienna Miller Style Evolution

    She's truly back to her hippie roots with a medieval princess vibe in a white Marchesa fishtail gown and crown of braids for the 2007 Met Gala.

  • Sienna Miller Style Evolution

    She embraces a risky red carpet outfit and thicker eyebrows (long before they became mainstream-trendy) to celebrate Valentino's 45 years in fashion in 2007.

  • Sienna Miller Style Evolution

    There's no hint of that early years bohemian spirit in this vampy Christian Dior gown and sleek hair at the 2008 Baftas.

  • Sienna Miller Style Evolution

    She adds a sharp edge to her black tasselled Jasmine de Milo dress with a vintage bowler hat at the Edge of Love premiere in 2008.

  • Sienna Miller Style Evolution

    She's very much back to boho in a puffball All Saints dress in 2009.

  • Sienna Miller Style Evolution

    Aaaand folk and frippery is banished a month later at the ShoWest awards where the actress showcases a distinctive geometric print mini dress by Jonathan Saunders.

  • Sienna Miller Style Evolution

    She's in her own 2812 label emerald green sparkling mini for the 2009 MTV Movie Awards.

  • Sienna Miller Style Evolution

    It's an old Hollywood glamour vibe in Yves Saint Laurent at the 2009 premiere of G.I. Joe: The Rise of Cobra.

  • Sienna Miller Style Evolution

    At the 2009 premiere of The September Issue, Sienna braves a tiny Thakoon flared mini and shades to mingle with the high fashion set.

  • Sienna Miller Style Evolution

    High drama with a rock chick edge in Emilio Pucci for the 2010 Met Gala.

  • Sienna Miller Style Evolution

    Later that year she's back to her old faithful Matthew Williamson at the designer's book launch.

  • Sienna Miller Style Evolution

    She cuts an Audrey Hepburn-esque figure in an LBD from her 2812 label in 2011.

  • Sienna Miller Style Evolution

    She's understated and chic in a Hugo Boss gown, dressed up with bold gold accessories in 2012.

  • Sienna Miller Style Evolution

    She's in a rebellios mood for the 2013 Golden Globes, wowing the red carpet in a floral Erdem crop top and matching floor-length skirt.

  • Sienna Miller Style Evolution

    She's best known for boho, but we've get the feeling Sienna prefers outfits with a little more edge.

    The actress dons a studded Burberry biker jacket and matching studded headband with white crepe dress for the punk-themed Met Gala last year.

  • Sienna Miller Style Evolution

    Yes, that is pink hair. Her experimental approach to red carpet dressing takes a grungy turn in this divine emerald green Burberry gown at the British Fashion Awards.

  • Sienna Miller Style Evolution

    She's in McQueen again for the 2014 Oscars and the gold armcuffs are back too, fiercer than ever.

  • Sienna Miller Style Evolution

    She's giving Kate Moss a run for her money at the model's Topshop launch in April in a stunning silver metallic mesh dress.

  • Sienna Miller

    Wearing a slicked back do at the premiere for Foxcatcher at The 52nd New York Film Festival in October this year, Sienna looked sensational in a midriff-baring top and metallic skirt.

  • Sienna Miller style evolution

    Opting for elegant Erdem here, she attended the International Medical Corps Awards, Los Angeles in October and looked radiant with her new cropped bob.

  • Sienna Miller style evolution

    At Mario Testino's 60th birthday party this October, the star turned up with her equally dapper boyfriend Tom Sturridge in tow. She opted for a red embroidered prom dress-style frock.

  • Sienna Miller Style Evolution

    Perhaps one of our favourite looks, early December, while out and about in New York, Sienna finally shunned her old boho look and gone for clean separates in block colours, all by Miu Miu. The short tousled hair style has changed her look completely.

  • Sienna Miller style evolution

    In an A.L.C dress at the American Sniper film luncheon, New York, in December. The ultimate sport luxe look done well.

  • Sienna Miller style evolution

    Having starred in one of Burberry's campaigns, with her other half no less, Sienna opted to wear the British brand to November's Evening Standard Theatre Awards.

  • Sienna Miller style evolution

    In Balenciaga at the American Sniper film premiere, New York in December. With her short hair, bold white dress, Sienna has completely changed her look of late, and we approve. 

  • Sienna Miller style evolution

    At the 2015 Oscars in Oscar de la Renta.

  • Sienna Miller style evolution

    Wearing a brilliantly bold one-shouldered dress by Marc Jacobs, to promote Burnt.

  • Sienna Miller style evolution

    In plunging Rodarte to promote Burnt.

  • Sienna Miller style evolution

    Owning the 2015 Cannes Film Festival in tiered Gucci.

  • Sienna Miller style evolution

    Sienna wows in shimmering Ralph Lauren at the amfAR Gala during the 2015 Cannes Film Festival.

  • Sienna Miller Style Evolution

    Stepping out again at Cannes in geometric Valentino.

  • Sienna Miller Style Evolution

    In shimmering custom-made Burberry at the 2016 Met Gala.

  • Sienna Miller style evolution

    Pairing a comfy knit with a pleated midi skirt to nail transitional style.