Morten Tyldum’s The Imitation Game stars Benedict Cumberbatch as Alan Turing, a brilliant cryptanalyst whose expertise cracked Germany’s “Enigma code” and helped turn the tide of World War II for the Allies, but his homosexuality still made him a target of persecution.  The film is really more about Turing than the war, but Tyldum weaves the Enigma plot throughout the film in a way that makes it feel like a spy thriller.

During my exclusive video interview with Keira Knightley, she talked about balancing fact versus fiction in the movie, what it's like being part of such an important and special film, what it was like working with Benedict Cumberbatch, if the script changed during production, her role in Baltasar Kormákur's Everest, and more.  Hit the jump to watch.  The Imitation Game is currently in theaters and also stars Matthew Goode, Charles Dance, Mark Strong, Rory Kinnear, Allen Leech, and Matthew Beard.  For more on the film, watch six clips, the trailer, or click here for all our previous coverage.

Keira Knightley:

• Did she immediately sign on when she was offered the role?
• Balancing fact versus fiction when making a movie.
• What was it like working with Benedict Cumberbatch and what did she take away from the experience?
• Did the script change at all during production?
• Talks about her involvement in the Everest movie.