What Big Secret Did Keira Knightley Reveal To Jude Law? (VIDEO)

Actress Keira Knightley is engaged to boyfriend, Klaxons keyboardist James Righton – so why did she admit to Jude Law that she’s cheating?! Relax, Keira isn’t two-timing her love: it’s from a scene from her and Jude’s upcoming movie, Anna Karenina, in which they play a married couple. Adapted from Leo Tolstoy’s great Russian novel, Anna Karenina tells the epic story of love. In a clip from the film, Anna (Keira) reveals to her husband Karenin (Jude) that she is in love with someone else, and is his mistress… DRAMA!

Watch the movie clip below:

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What’s the biggest secret you’ve ever told – or how did you tell someone?