Rapper, actor and entrepreneur Master P has been cast alongside his brothers, Silkk the Shocker and C-Murder, in "Undisputed," a prison boxing film starring Wesley Snipes, Ving Rhames and Peter Falk.

According to Master P's reps, "Undisputed," due later this year, is being filmed in Nevada by Walter Hill, who has directed such flicks as "48 Hours," "Last Man Standing," "Supernova" and "Trespass," which featured Ice-T.

In "Undisputed," Falk plays a gangland promoter who sets up a prizefight between Rhames and Snipes, two former boxing champs who are now doing time in prison. Master P, Silkk and C-Murder will portray some of Snipes and Rhames' fellow inmates, and the three rappers are slated to begin shooting their scenes, including a sequence of them performing, this week.

In related news, "Lockdown," another prison movie that Master P executive-produced for his No Limit Films and which he also has a supporting role in, closed out the Hollywood Black Film Festival on Sunday in Culver City, California.

Considering the soft sales of his last two solo albums, Master P may want to focus on his cinematic career. After selling 2.2 million copies of 1998's MP — Da Last Don, SoundScan figures indicate that sales of Master P's next two albums dropped off considerably, with 1999's Only God Can Judge Me selling 637,000 copies and his newest effort, Ghetto Postage, moving less than 376,000 copies to date.

Master P also has a few small-screen guest spots lined up — he will appear in the Fox sci-fi series "Dark Angel" on February 6, and he'll turn up in the March 11 episode of the HBO prison drama "Oz."