Keisha Knight PulliamKeshia Knight Pulliam aka Little Rudy from “The Cosby Show” has grown all up and is set to play a hooker in her next film.

The actress will star as an imprisoned prostitute in “Tyler Perry’s Madea Goes to Jail.”

Writer-director Tyler Perry returns to the big screen as the crazy-granny Madea character, whose penchant for trouble-making lands her behind bars. And that’s where Madea comes to the rescue of Candy (Pulliam), a fellow inmate preyed upon by a large woman.

Filming is scheduled to begin next month in Atlanta, with a tentative early 2009 release date planned.