Jeff Daniels will join Jon Heder and Diane Keaton in Mama's Boy, the Warner Independent Pictures comedy that will be directed by Tim Hamilton.

According to Variety, Jon Heder plays a slacker who must re-evaluate his life after his mom, with whom he lives, gets a new boyfriend, a self-help guru. Jeff Daniels will play the suitor, who begins to edge the youth out of the house, prompting a mano-a-mano confrontation.

Hank Nelken wrote the script, Heidi Santelli is producing and Steve Carr is executive producing.

Daniels was last seen in The Squid and the Whale and is familiar to many as Jim Carrey's sidekick in Dumb and Dumber.