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Sienna Miller almost single-handedly reinvented boho back in the summer of 2005, bursting onto our fashion radar with her hippy, deluxe look.
Since then she's polished up her act and her wardrobe is now full of the kind of très chic separates and red carpet dresses that every girl wishes for.
Check out every one of Sienna Miller's beautiful boho looks right here...
Sienna Miller attends the 2023 The Prince's Trust Gala, April 2023
Sienna Miller looked gorgeous in a completely sheer slip dress from Fendi's SS23 Couture collection. Featuring delicate embroidery, the blonde decided to pair the gown with nothing but nude underwear for the charity event.
Sienna Miller attends the 2023 Vanity Fair Oscar Party, March 2023
Miller wowed in a backless, metallic gown while at the Vanity Fair Oscar Party. The actor paired the metallic dress with silver vertiginous heels, a Fendi baguette bag, and pearl drop earrings.
Sienna Miller attends Gucci's 'High Jewellery Collection' launch in Paris, January 2023
Proving she's a woman who can do both, Miller paired a sheer, fawn and peach mini dress with punky, thigh-high boots, both by Gucci, for the brand's new jewellery launch in Paris.
Sienna Miller attends the National Board Of Review Annual Awards Gala, January 2023
Sienna Miller's latest look is the perfect throwback to her boho days. The actor attended an awards gala in New York wearing a sheer, ruffled dress that is giving major vintage, early-2000s vibes – but is in fact straight off the Alessandra Rich SS23 runway. Miller completed the look with a Y2K-esque embellished belt worn low on the hips, as well as diamond Samir Halimeh jewellery and metallic heeled sandals. Divine!
Sienna Miller attends Claridge's Christmas Tree Party with Jimmy Choo, November 2022
Sienna Miller made a surprise appearance in the hallowed halls of Claridge's for the hotel's unveiling of its 2022 Christmas tree, designed by Sandra Choi of Jimmy Choo. The star put her own spin on festive party dressing for the occasion, wearing an all-black look by Simone Rocha featuring a babydoll-style mini-dress, suspenders, over-the-knee leg-warmers and heels.
Sienna Miller attends Deliciously Sorted's party in Ibiza, August 2022
Sienna Miller attended a star-studded party in Ibiza in her signature boho style, offsetting her golden tan with a chic all-white outfit. The actor wore a pair of Charles & Keith white ankle boots with loose linen trousers and a crop top, with her favourite Prada Cleo bag.
Sienna Miller attends 'The Sandman' premiere, August 2022
Sienna Miller has splashed back onto the scene in serious style, stepping out for the London premiere of The Sandman at the BFI last night. The actor was as effortlessly chic as ever, wearing a baby blue, knitted cut-out dress by Self-Portrait, accessorised to perfection with Prada's cult Cleo bag and The Row sandals.
Sienna Miller attends the Monte-Carlo Gala For Planetary Health, September 2020
Miller looked glowing in a Gucci latex and velvet dress at the Monte-Carlo event.
Sienna Miller in Rebecca Vallance
The actress walked the red carpet at the 72nd Writers Guild Awards in New York City wearing a bow-detailed striped satin-jacquard midi dress by Rebecca Vallance.
She teamed the look with a Mansur Gavriel lamb cloud clutch bag.
Sienna Miller in Gucci
The 37-year-old gave a lesson in holiday season dressing in this all Gucci ensemble. Alongside the sheer shift dress, the mother-of-one wore a pair of logo-patterned tights that are thankfully in stock right now.
Sienna Miller in Alessandra Rich
The actor opted for Kate Middleton-favourite Alessandra Rich to talk about film 21 Bridges in New York. This isn't the first time the former ELLE cover star has chosen the brand, having worn another gorgeous Rich dress to Ellie Goulding's wedding back in September.
Sienna Miller in Chloé
The actress looked ethereal in an off-white Chloé SS20 halterneck dress with a floral print for the 21 Bridges in New York.
Sienna Miller in Gucci
The ELLE UK cover star wore a Gucci blazer and trouser combination to La Mer by Sorrenti Campaign at Studio 525.
Sienna Miller in Gucci
The mother-of-one looked glam front row at Gucci's SS20 show in Milan.
Sienna Miller at the 45th Deauville American Film Festival in France
The actress was the epitome of old-school glamour while in France, wearing a sleeveless black roll-neck top, a white, pleated midi skirt and Gucci platforms.
Sienna Miller at the 45th Deauville American Film Festival
The mother-of-one wore a monochromatic gown to the premiere of her new film American Women in France.
At the Tony Awards in Miu Miu
Sienna Miller wore an A-line black lace Miu Miu cocktail dress with a black velvet belt enhanced by Swarovski crystals to the Tony Awards 2019 at Radio City Music Hall in New York. June 2019.
If you want an adorable black dress like Sienna's, click here to view our LBD gallery.
At the Premiere of 'American Woman' in LA
Sienna wowed on the red carpet in this gold Ralph Lauren Spring 2019 dress, for the premiere of American Woman in LA, June 2019.
At the Met Gala
Sienna wore a silver Paco Rabanne dress to the 2019 Met Gala.
Spring Gala, April 2019
Sienna Miller attended the New Museum 2019 Spring Gala at Cipriani Wall Street in silver lamé floor-length gown.
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