Keira Knightley

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British actress Keira Knightley poses as she arrives for the world premiere of "Anna Karenina" in London on Tuesday, Sept. 4, 2012. (AP Photo/Sang Tan)

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Trapped in a loveless marriage, Keira Knightley succumbs to the ardent pursuit of a dashing young officer in “Anna Karenina.” (Associated Press)

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Actress Keira Knightley appears on the cover of the October issue of Vogue, which goes on sale nationwide Sept. 25. (AP Photo/Vogue)

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FILE - In this Jan. 31, 2012 file photo, actress Keira Knightley arrives for the Gala Premiere of A Dangerous Method at the May Fair Hotel, in London. Knightley, the glamorous star of "Pirates of the Caribbean," is engaged to marry musician James Righton, her publicist said Friday. (AP Photo/Joel Ryan, file)

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British actress Keira Knightley arrives for the London Film Festival opening premiere of the film, Never Let Me Go, at a central London cinema, Wednesday, Oct. 13, 2010. The festival runs until Oct. 28, 2010. (AP Photo/Joel Ryan)

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British actresses Keira Knightley, right, and Carey Mulligan pose for photographs during a photo call for the film Never Let Me Go which opens the London Film festival, at a central London cinema, Wednesday, Oct. 13, 2010. (AP Photo/Joel Ryan)

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Japanese novelist Kazuo Ishiguro poses with British actresses Isobel Meikle-Small, Carey Mulligan, Ella Purnell, and Keira Knightley, alongside Director Mark Romanek, from left, during a photocall for the film 'Never Let Me Go', at a central London cinema, Wednesday, Oct. 13, 2010, ahead of the London Film Festival. (AP Photo/Joel Ryan)