Year One is a 2009 American adventure comedy film directed by Harold Ramis and distributed by Columbia Pictures. The film was written by Harold Ramis, Gene Stupnitsky, and Lee Eisenberg and stars Jack Black and Michael Cera. Its story follows Zed and Oh, two hunter-gatherers who travel to the city of Sodom after being banished from their tribe. Problems quickly emerge during their journey, as they encounter several biblical figures along the way.

The film was produced by Judd Apatow's production company The Apatow Company and was released on June 19, 2009. It grossed $19.6 million in its opening weekend and $62.4 million worldwide, against a budget of $60 million.[2] It was generally negatively reviewed, receiving only a 14% approval rating based on 173 votes on Rotten Tomatoes. This marked the final film directed, produced, written and starring Harold Ramis before his death in February 2014.