Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images

WHAT SHE WORE Knightley posed backstage at The Tonight Show with Jay Leno in a lace Burberry Prorsum sheath and ankle-strap heels.

CELEBRITY: Keira Knightley

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Keira Knightley

Keira Knightley gave us something to envy in Burberry

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