Atonement is a 2007 romantic war drama film directed by Joe Wright and starring James McAvoy, Keira Knightley, Saoirse Ronan, Romola Garai, and Vanessa Redgrave. It is based on the 2001 novel by Ian McEwan. The film chronicles a crime and its consequences over six decades, beginning in the 1930s. It was produced for StudioCanal and filmed in England. Distributed in most of the world by Universal Studios, it was released theatrically in the United Kingdom on 7 September 2007 and in North America exactly three months later on 7 December 2007.

Atonement opened both the 2007 Vancouver International Film Festival and the 64th Venice International Film Festival, making Wright, at age 35, the youngest director ever to open the Venice event. The film was a commercial success and earned a worldwide gross of approximately $129 million against a budget of $30 million. Critics praised its acting, emotional depth, Wright's direction, Dario Marianelli's score, the cinematography, editing, visuals, and the film's incorporation of real-life events.

Among numerous accolades, Atonement was nominated in seven categories at the 80th Academy Awards, including Best Picture, Best Supporting Actress (for Ronan), Best Adapted Screenplay, and Best Original Score, which it won; and also garnered fourteen nominations at the 61st British Academy Film Awards, winning both Best Film and Production Design; and won the Golden Globe Award for Best Motion Picture – Drama.