Sienna Miller's style & every time she out-fashioned basically everyone

Sienna Miller is our eternal fashion crush. From boho Brit in the ultimate festival clothing to Stateside Chic, see all the times she out-fashioned literally everyone...
PA PhotosWay back when, a whole nation of GLAMOUR girls instantly fell for Sienna’s hippy aesthetic as she was catapulted into fame thanks to her famous then-boyfriend, Jude Law.
PA PhotosOkay, so the strapless white gown Si wore to support Jude at the 2004 premiere of his Cold Mountain was passable, but despite the addition of some interesting chunky bangles, she wasn’t quite making style icon status just yet.
PA PhotosA dramatic change of hair colour left women divided – but while we debated whether she looked better as a blonde, Sienna was rocking this gorgeous purple silk mini to another Cold Mountain premiere.
PA PhotosAhh, the furry gillet! The slouchy boots! The Balenciaga bag! Sienna crammed all her trademark pieces into one outfit – and sparked the flurry of media comparisons between her and Kate Moss - as she walked through West London in 2004.
PA PhotosSienna pulled out all the stops with her outfit at the 2004 Oscars in this gorgeous green gown made by her close pal Matthew Williamson.
PA PhotosMiss Miller wowed in this Roberto Cavalli halter neck dress at the Serpentine summer party 2004.
PA PhotosIt was still acceptable to wear your oldest, most hole-filled sweater and some battered wellies to a festival in the days BS (Before Sienna). But she upped the style stakes in this Plein Sud dress, studded belt and nu-rave sunnies at 2004’s Glastonbury shindig – meaning we now all spend hours rather than minutes stressing about our festival fashion. Er, thanks.
PA PhotosSienna goes for the all-out hippy vibe at a film screening in this Pallenberg-inspired floppy hat, floral print blouse and slouchy, Seventies style suede bag.
PA PhotosSienna works the erm, disheveled look, at a tennis event in 2004.
PA PhotosMmmm Mouret. Sienna gets it just right in this Roland Mouret masterpiece.
PA PhotosAt the premiere of Layer Cake Sienna Miller worked her customarily quirky style, shunning over-the-top red carpet gowns in favour of this studded Chloé number and cowboy boots.
PA PhotosSporting a brand new rock on her wedding finger (she and Jude got engaged on Christmas Day 2004), Sienna began to seal her fashion credentials in this directional dress coat from Balenciaga, matched with a pair of the fashion house’s über-cool gladiator sandals.
PA PhotosWe really couldn’t make up our minds about this one – in principle, this Alexander McQueen floor-length dress is pretty enough, but we can’t help feeling Sienna could have made more of an effort for the 2005 BAFTAs. Top marks for the ultra-long David Yurman chain, though.
PA PhotosPlumping for the ‘princess’ vibe, and scoring a legion of headband copycats, our up-and-coming stylista wore the bubblegum pink Matthew Williamson Moet dress at a London Fashion Week party in 2005.
PA PhotosRed carpet-wise she wasn’t putting a foot wrong, but it was her street style that was to turn Sienna into a Best Dressed list staple. Snapped leaving a London theatre, she wore a Sass & Bide white mini skirt, Annette Oliviera grey suede boots and a trusty Balenciaga bag.
PA PhotosTo the tune of screeching brakes Sienna stepped out onto the 2005 Venice Film Festival red carpet in this simply divine, literally traffic-stopping grey draped gown.
PA PhotosIt was a country affair for the elder Miller sister Savannah, who married in a country house in Devon back in 2005. Eschewing the traditional guest attire, Sienna wore a vintage-style frock and waistcoat and a pretty flower in her hair.
PA PhotosSienna showed Jude exactly what he was missing post break-up in this Stella McCartney jumpsuit, black stilettos, gold cuffs and her new cool-as-cucumber crop at the premiere of Casanova.
PA PhotosLace-up knee boots, grey skinnies and military coats – yup, it’s Sienna’s official 2005 uniform.
PA PhotosThis gorgeous Louis Vuitton dress – contrasted with black tights and ankle boots – was Sienna’s garb of choice for another Casanova premiere.
PA PhotosNever has a Miller outfit garnered so much disagreement – did we like the Thomas Wylde studded gown Si wore to the 2006 Vanity Fair Oscars Party, or did we actually hate it? You decide.
PA PhotosWith Burberry’s creative director Christopher Bailey on her arm, Sienna rocks one of the brand’s gold sequinned mini dresses to ultra-chic effect at the Costume Institute Gala in 2006.
PA PhotosSienna begins her Marchesa love affair (and ours) in this other-worldy floaty gown.
PA PhotosMore Marchesa for Miller in the gold patterned dress she wore to the 2006 Golden Globes ceremony. Note the Cartier jewels and the on-trend Heidi hair.
PA PhotosYet more Marchesa – this time a white mini dress with a single rose embellishment – paired with Louboutin peep-toes for the fashion house’s second anniversary party.
PA PhotosYum - Chloé Silverado knee boots do a jealous GLAMOUR.COM team make. Sienna puts hers with skinny jeans and a harness belt (no, we don’t quite understand it either, but at least she gets points for being daring).
PA PhotosFor the Factory Girl premiere in New York, Sienna Miller opts for this stunning Burberry flapper dress.
PA PhotosIt was an Emanuel Ungaro gown from the designer’s autumn 2006 collection that Sienna chose for the 2007 BAFTAs.
PA PhotosWith her fashion cred now firmly secured in the GLAMOUR.COM team’s mind, Sienna pulls out the big guns in this embellished Burberry mini dress and Sergio Rossi shoes for the UK premiere of her film Factory Girl.
PA PhotosThere’s nothing like a bit of self-promotion if you’re a celeb-turned-fashion designer, so Sienna donned a dress and blazer from her own Twenty8Twelve line for an appearance on David Letterman’s US chat show.
PA PhotosIt’s red, it’s feathered, it’s envy-inducing Valentino. Need we say more?
PA PhotosNot many A-listers would dare wear a top hat on the red carpet, but her individuality is why we’ve come to love this Brit actress. The Jasmine di Milo fringed dress and Balenciaga clutch aren’t half bad, either.
PA PhotosMaking flip flops look like high fashion, Sienna strutted her stuff earlier this year in rolled up jeans and layered vests.
PA PhotosWith the boho babe finally gone, Miss Miller puts her best fashion foot forward in this futuristic Jonathan Saunders dress (complete with totally on-trend sci-fi shoulders) at a film awards ceremony.
PA PhotosGoing back to, er, red, Sienna’s clearly learnt what suits her best. The modified Marios Schwab dress which she wore to a screening of new film The Mysteries of Pittsburgh perfectly matches her blonde locks and bright lippy.
PA PhotosThis patent quilted bag, Stephen Sprouse for Louis Vuitton scarf and studded red Chloé boots are a recipe made in accessory heaven.
PA PhotosSienna’s combo of this Chanel Breton t-shirt, turned up jeans and suede ankle boots is an example of perfect off-duty cool.
PA PhotosSienna shines in this green Swarovski encrusted mini-dress from Twenty8Twelve, worn with a silver Chanel clutch and Star Trek-worthy Nicholas Kirkwood heels.
Rex FeaturesAt The Beatles Illuminated, Sienna Miller proves that the right pair of heels can lift any outfit to high octane status.
Rex FeaturesSienna's failsafe party formula = complement an LBD with a sleek up-do.
PA PhotosThis lace-topped, tassel-trimmed number by Emilio Pucci was Sienna's outfit of choice for the 135 Years Of French Legerete party in 2011.
Rex FeaturesIn 2012 Sienna showed how to dress your baby bump in a cute Breton top and ruffled cape.
Rex FeaturesAt the Hamptons International Film Festival just months after giving birth Sienna is looking pretty fly in a pair of printed trousers, a prim and proper cardi and ultra-cool sunglasses
Rex FeaturesSienna Miller usually favours tougher, edgy looks, but this super-feminine pink Valentino SS13 dress was the perfect choice for the BAFTA tea party in 2013.
PA PhotosWe don't know why Sienna Miller went home empty handed at the TV BAFTAs 2013 (we LOVED Hitchcock drama The Girl) - but she gets our best dressed award for this blue lace Matthew Williamson frock.
Rex FeaturesSienna opted for a mid-length peachy dress at the 66th Annual Tony Awards.
PA PhotosA picture of summer perfection in 2013, Sienna opts for flowing blonde waves and a floral frock.
Rex FeaturesIn 2014 with a new bob haircut Sienna looked absolutely smokin' in a sheer white dress.
Rex FeaturesSienna brightened up winter 2014 in New York with this cobalt A.L.C. zip-front dress.
PA PhotosFor the BFI London Film Festival screening of Foxcatcher, Sienna Miller blew the style competition out the water in this shimmery silver and nude floor-length creation from British label, Galvan. Way to make a statement, Sienna.
Rex FeaturesSienna Miller eschewed her boho style credentials in favour of this gorgeous and girly plunging Miu Miu confection at the 2015 Golden Globes.
Rex FeaturesOut and about in 2015, Sienna Miller looked effortlessly chic (as only she knows how) in a striped midi dress.
PA PhotosDouble stripes and double style points for this out and about ensemble. Sienna seems to be embracing a more polished approach to style for 2015; and it's not suprise that she seems to be nailing it.
Getty ImagesIt could be the tights vs white dress combo or the bare arms with tights, but something doesn’t sit well with this outfit worn in New York. It also looks extremely cold.
Rex FeaturesDuring NYFW Sienna Miller attended the Calvin Klein AW15 show in all-white. This minimalist outfit is ultra lady like with a light palette for both her dress and jacket. Plus? The 'do ain't looking too bad either.
Getty ImagesSienna enjoyed a night out with her fiance for the American Buffalo press evening in London dressed in a spacey silk top and touser combo. We love that she matched the fire illustration on her shirt to her bag and her lips.
GettyNever one to play it safe, Sienna Miller wore an embellished Thakoon trouser suit to the 2015 Met Gala, and looked nothing short of INCREDIBLE.
Getty ImagesSienna nailed yet another look in Nice, France. Pairing her neutral silk top with a dusty pink bag and matching lipstick was a wise move.
XposureShe may have just split from her long-term parter, Tom Sturridge, but Sienna Miller still has her glow. The actress looked stunning dress in an LBD and Prada shoes in New York.
RexSienna, thankfully, still hasn't lost her boho roots - it just looks more grown-up now. The actress teamed a printed maxi skirt with a knit crop top while strolling around New York with her parents, Edwin and Jo.

Sienna kept it simple for her sister's clothing launch at Debenhams.
Getty ImagesFor the San Sebastian Film Festival High-Rise photocall, Sienna wore this figure hugging, new season Victoria Beckham dress. The over-sized gingham made a real statement paired with her her favourite Pierre Hardy ‘Radical Trek’ chunky heels.
Understated and chic with its body-hugging silhouette, I love this look for its refined ease.
Getty ImagesFor the premiere that evening, the actress made heads turn in a stunning, minimalist, 90s Galvan gown. This is how you do "cool".
Getty ImagesSienna played with pretty cream lace and sheer fabrics while attending Eva Cavalli's birthday party at One Mayfair. We also seriously want to steal that sparkly box bag, pronto!
RexHow to wear your jumpsuit when the weather gets cooler? Layer it up with a sleek leather top as Sienna did for an appearance on Good Morning America.
Getty ImagesSienna rocked a one-shouldered colourful Marc Jacobs dress at the premiere of Burnt. We love the festive feel to her outfit!

She worked a faux fur coat, a Gucci bag, copped skinnies and a chunky ankle boots for the reopening of legendary nightspot 100 Wardour Street for a look that recalls the 70s without looking like fancy dress.
Getty ImagesWorn to the New York premiere of High-Rise, Sienna Miller made a case for safety pins in this Christopher Kane dress. Yuh-huh.
Rex FeaturesShe wore at feminine Dolce & Gabbana summer dress to the polo in June 2016.

Sienna was a vision at Wendy Rowe's book launch in London. This black and gold dress is divine.
Getty ImagesSienna looks the picture of summer at Wimbledon 2016 in her preppy pleated dress teamed with androgynous brogues.
Getty ImagesSienna is boho elegance personified at Cartier's Fifth Avenue Grand reopening in September 2016.

At the The Lost City of Z premiere at the New York Film Festival, Sienna Miller looked amazing in a spring/summer '17 Prada look
Rex FeaturesSienna attended the Tribeca and Chanel Women’s Filmmaker Luncheon in New York wearing a check Chanel jacket and leather shorts with tights. It's a thumbs up from us.
Getty ImagesSienna attended the 2017 Breakthrough Prize awards wearing a gorgeous pink gown with frill and lace detailing.
Getty ImagesTo the premiere of Live By Night, Sienna swapped out her just-threw-this-on style for some all-out glam. Opting for an intensely good ruffled Gucci gown (with added sequins), all eyes were on our girl Sienna.
Getty ImagesSienna Miller took 50s touches - including her gorgeous monochrome silk dress and glamorous waves - and made them modern at the premiere of Live By Night. Simply stunning.
Getty ImagesWoah. Sienna looked totally dreamy in Dior for the premiere of The Lost City of Z, wearing a sheer, floral dress from the brand.
Getty ImagesAnother day, another premiere. This time, Sienna wore a stunning intricate corset gown by Alexander McQueen. And can we talk about her shoes?! The gold ankle-tie pair add interest to her white dress.
Rex FeaturesSienna has been favouring a super simple but super effective combo lately: shirt and jeans. An instant way to smarten the look up is with some decorative shoes like Sienna.
Getty ImagesLeaving the theatre after a performance of Cat On A Hot Tin Roof, Sienna looked quietly cool in black skinnies, mules and a chic tote. Her incredible contrast leather jacket made the look. Sorry to let you down but we can't tell you where it's from on this occasion. If anyone has the intel, holla.
Getty ImagesSienna has been laying low recently but she made a welcome comeback as she arrived on the red carpet for the Santos de Cartier Watch Launch at Pier 48 in a super chic white cutaway dress.