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Keira Knightley on Anna Karenina

7 September 2012 Last updated at 06:13 BST

Keira Knightley may traditionally play the English rose, but her latest film sees her step into a darker role as a Russian aristocrat.

She takes the title role in Anna Karenina, directed by Joe Wright who also worked with her on Pride and Prejudice and Atonement.

Keira Knightley spoke to BBC Breakfast's Louise Minchin.