Brenda Blethyn, Vanessa Redgrave and Romola Garai have signed on to the drama, Atonement for Focus Features and Universal Pictures International.

The film already stars Keira Knightly and James McAvoy and newcomer Saoirse Ronan as a 13-year-old who damages the lives of all around her when she accuses her sister's boyfriend of a crime he did not commit, says Variety. Atonement is based on the Ian McEwan novel.

Joe Wright is taking directing duties on Atonement which started shooting in England last week; a 2007 release has been set.