Oswalt, Wilson join Theron in 'Young Adult'

Patton Oswalt and Patrick Wilson have reportedly joined the cast of upcoming dark comedy Young Adult.

Jason Reitman is directing the film starring Charlize Theron, according to The Hollywood Reporter.

The Mandate project centres on a writer of young adult fiction who returns to her Minnesota home to reunite with her married ex-boyfriend, who is also a new father.

Oswalt will play a self-loathing, crippled man who used to have a crush on Theron's character.

Wilson will play Theron's high school boyfriend.

Diablo Cody, who wrote the film's script, previously teamed up with Reitman on the Oscar-winning Juno.