Here at Fab, British beauties and style icons Alexa Chung and Sienna Miller have each claimed a place in our fashion hearts. They're both a go-to source for style inspiration, whether they're gracing a red carpet or passing through Heathrow — Alexa for her tomboy-eclectic ways, Sienna for her effortless-chic. But, when it comes to picking a favorite, we're a little divided here in the office; that's why we're leaving it up to you! Click through for 25 of Sienna and Alexa's memorable fashion moments, then cast your vote for the Brit with the best style sense.
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