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Macbeth premiere, Cannes
If you’ve had an eye on this year’s Cannes red carpet, you’ve seen Sienna in everything from shimmering Calvin Klein to starry Sonia Rykiel to geometric Valentino. This look was our fave: the gown pays homage to her bohemian style roots, and that unexpected pop of teal is so Sienna.
See All the Looks From the Cannes 2015 Red Carpet