Atonement is a 2007 British romantic drama war film directed by Joe Wright. It is a film adaptation of the 2001 novel of the same name by Ian McEwan. The film stars James McAvoy, Keira Knightley, and Saoirse Ronan. It was produced by Working Title Films and filmed throughout the summer of 2006 in England and France. Distributed in most of the world by Universal Pictures, it was released in the United Kingdom and Ireland on 7 September 2007, and in North America on 7 December 2007.

In 1935, 13-year-old fledgling writer Briony Tallis (Saoirse Ronan) and her family live a life of wealth and privilege in their enormous mansion. On the warmest day of the year, the country estate takes on an unsettling hothouse atmosphere, stoking Briony's vivid imagination. Robbie Turner (James McAvoy), the educated son of the family' s housekeeper, carries a torch for Briony' s headstrong older sister Cecilia (Keira Knightley). Cecilia, he hopes, has comparable feelings; all it will take is one spark for this relationship to combust. When it does, Briony -- who has a crush on Robbie -- is compelled to interfere, going so far as accusing Robbie of a crime he did not commit. Cecilia and Robbie declare their love for each other, but he is arrested -- and with Briony bearing false witness, the course of three lives is changed forever.

Briony continues to seek forgiveness for her childhood misdeed. Through a terrible and courageous act of imagination, she finds the path to her uncertain atonement, and to an understanding of the power of enduring love.

Atonement opened the 64th Venice International Film Festival, making Wright, at the age of 35, the youngest director ever to open the event. The film also opened the 2007 Vancouver International Film Festival.

The film received positive reviews from film critics. The review site Rotten Tomatoes records that 83% of 196 critics gave the film positive reviews, with a consensus that "atonement features strong performances, brilliant cinematography and a unique score. Featuring deft performances from James McAvoy and Keira Knightley, it's a successful adaptation of Ian McEwan's novel."

The film won an Oscar for the Best Original Score at the 80th Academy Awards, and was nominated for six others, including Best Picture, Best Adapted Screenplay and Best Supporting Actress (Saoirse Ronan). At the 61st British Academy Film Awards it won Best Film and Production Design awards.