Movie Trailer: 'Atonement'

It's already generating Oscar buzz for everyone involved, and now "Atonement," starring Keira Knightley and James McAvoy, has an official trailer. Based on the acclaimed novel, the film -- opening December 7 -- tells the story of a young writer who changes the course of several lives when she falsely accuses her sister's lover of a crime. For more of the week's brand new trailers, including "Iron Man" and "One Missed Call," click here.