Craig Robinson, Heather Graham, Johnny Knoxville and Camilla Belle are joining Kevin Spacey in Trent Cooper's upcoming comedy "Father of Invention."

The Hollywood Reporter says Cooper and Krane and Nichole Beatty wrote the script, which follows a stinking rich inventor (Spacey) who goes to jail after one of his creations goes wrong. Once he's released, he runs into several struggles making up time with his family.

The trade reports Robinson plays the husband of the inventor's ex-wife. Belle is on-board as his daughter, and Graham will star as her lesbian roommate. Knoxville will play a store manager who hires Spacey after his prison time.

Craig Robinson's credits include "Pineapple Express," "The Office" and "Zack and Miri Make a Porno." Belle last starred in "Push," while Knoxville was last seen in "The Ringer." Graham is currently onscreen in "The Hangover."

I know it sounds like an odd pair, but Johnny Knoxville and Cher are in talks to star in Ricky Blitt's comedy "The Drop-Out."

According to the Hollywood Reporter, the film "tracks the fortunes of a 35-year-old career college student (Knoxville) who is finally kicked out of his parents' house.

Desperate, he decides to get in good with the 62-year-old woman next door (Cher), so he can keep his food, couch and TV regimen intact. In the mix is the woman's ne'er-do-well son, who is looking for a father figure, even if it's a guy his own age."

"The Drop-Out" marks Blitt's directorial debut. He also wrote 2005's comedy "The Ringer," which also starred Knoxville.

Knoxville is currently producing MTV's new show "Nitro Circus." As for Cher, she was last seen in Bobby and Peter Farrelly's "Stuck On You."

Knoxville and Cher together in one film... can you believe it?