Sienna Miller first started her career as a model, but soon moved into the world of fashion design when she started label Twenty8Twelve with her sister, so it's no surprise that she is a firm fixture on the front row at Fashion Week.
With her effortlessly cool and laid back style, Sienna isn't afraid to make daring fashion choices, and fans are continually coveting her ability to pull off whatever she wears.
HELLO! Fashion take a look at some of her best fashion moments to date...
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