Irréversible (French: [iʁevɛʁsibl]) is a 2002 French art thriller film written and directed by Gaspar Noé. Starring Monica Bellucci, Vincent Cassel, and Albert Dupontel, the plot depicts the events of a tragic night in Paris as two men attempt to avenge the brutal rape and beating of the woman they love. The film is made up of a title sequence followed by 14 segments made to look like long takes. Each of these segments is either a continuous shot or a series of shots digitally composited to resemble a continuous shot. The story is told in reverse order, with each scene taking place chronologically before the one that precedes it.

Theatrically released in France, the United Kingdom and the United States, Irréversible competed for the Palme d'Or at the 2002 Cannes Film Festival and won the Bronze Horse at the Stockholm International Film Festival. Critical reception was mixed, with praise towards the performances and Noé's direction, but criticism towards its graphic portrayal of violence and rape. American film critic Roger Ebert called Irréversible "a movie so violent and cruel that most people will find it unwatchable," and around 200 people walked out of the screening at Cannes. A version of the film told in chronological order, Irreversible: Straight Cut (French: Irréversible – Inversion intégrale), was released in 2020.