One thing's for sure, Sienna Miller is always dressed for the occasion. On Tuesday night, she attended BFI’s Luminous Gala Dinner in London, and although she was joined by Homeland star Damian Lewis and his wife, Helen McCrory, Sienna's beautiful white dress stole the show. We've come to expect great things from Sienna; she always looks incredible while out on dates with fiancé Tom Sturridge, and when it came time to pull her weight at the Clinton Global Initiative and talk about her work with International Medical Corps, she was all business. Get a closer look at Sienna's gorgeous dress, as well as a shot of Damian and Helen, when you read on!
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