John C. Reilly plays John, a guy who is looking for love as his ex-wife is about to get remarried. He meets Molly (Marisa Tomei) at a party that his ex-wife and fiance are throwing, and the two hit it off. Molly is very secretive, though, when it comes to talking about her life. When John follows Molly home, he finds out what she's been hiding - Her grown son, Cyrus (played by Jonah Hill), still leaves with her, in a sort of time capsule single mother/son relationship. They do everything together. They're best friends, and when John starts horning in on his mother's time, Cyrus becomes jealous, and when Cyrus becomes jealous, things get weird.
Cyrus is a humorous indy, and, maybe, the Duplass Brothers best film to date. Everyone brings in a great performance, including Jonah Hill (who I've never been a huge fan of). It's not the kind of film that has you rolling around on the ground laughing, but it definitely has its great moments, especially when things escalate between John and Cyrus. The Duplass Brothers have made something super solid and funny, and have shown what studio heads seemed to forget regularly - that a funny film, or any film, really, can be made for a reasonable amount of money.