Cyrus is a 2010 romantic comedy-drama film written and directed by Jay and Mark Duplass and distributed by Fox Searchlight Pictures. Its story follows John, a recent divorcée who meets and instantly falls for a woman named Molly. The two start a relationship but John soon comes to find out that Molly's overprotective son, Cyrus, does not want to share his mother with anyone else. It stars John C. Reilly, Jonah Hill, Marisa Tomei, and Catherine Keener.

The film was produced by Michael Costigan. It premiered at the Sundance Film Festival on January 23, 2010, and was released on June 18, 2010. It grossed $181,716 during its opening weekend and $9.9 million worldwide, against a budget of $7 million.