She dazzles just as easily in denim cutoffs as she does in Versace, and lends a signature bohemian flair to anything she puts on. And because today is Sienna Miller's 31st birthday, there's only one way to celebrate the style star — with a fashion tribute, of course. Click through for over 60 fabulous looks and red carpet moments from the boho beauty, and join us in wishing this December baby a very Happy Birthday!
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