Atonement is a 2007 film starring James McAvoy and Keira Knightley. It is adapted from Ian McEwan's novel of the same name and directed by Joe Wright. Fledgling writer Briony Tallis, as a 13-year-old, irrevocably changes the course of several lives when she accuses her older sister's (Keira Knightley) lover (James McAvoy) of a crime he did not commit. The film was produced by Working Title Films and distributed worldwide by Universal Studios, with the US release through the Focus Features division. It was released in the United Kingdom and Ireland on September 7, 2007, and in limited release in North America on 7 December 2007.
One of the best movie I have ever seen. Keira Knightley and James Mcavoy are wonderful, the music by Dario Maranelli is perfect and the story is beautiful, even if it's also really sad. It made me cry. But I really loved it. You have to watch it.