Atonement (2007)

James McAvoy (born April 21, 1979) is a Scottish actor. He made his acting debut as a teen in The Near Room (1995) and appeared mostly on television until 2003, when his feature film career began. His notable television work includes the thriller State of Play, science fiction miniseries Frank Herbert's Children of Dune and the channel 4s BAFTA award-winning series Shameless (British TV series).

Keira Christina Knightley (born 26 March 1985) is an English actress. She has starred in both independent films and big-budget blockbusters and is particularly noted for her roles in period dramas. Her accolades include two Empire Awards and nominations for two Academy Awards, three British Academy Film Awards, three Golden Globe Awards, one Screen Actors Guild Award and one Laurence Olivier Award

Saoirse Una Ronan (/ˈsɜːrʃə ˈuːnə ˈroʊnən/ SUR-shə OO-nə ROH-nən; born 12 April 1994) is an American-born Irish actress. Primarily known for her work in period dramas since adolescence, she has received various accolades, including a Golden Globe Award and nominations for four Academy Awards and seven British Academy Film Awards.