Shar Jackson
Jean-Paul Aussenard/WireImage
"I am having a blast," Jackson tells PEOPLE. "The cast is absolutely amazing."
In the episode, Jackson's character Alyson is a young mother whose teenage daughter uses Chris's sister as a cover to sneak into an R-rated movie and visit a boy's house. Chris's mother Rochelle, played by Tichina Arnold, takes Alyson aside to confront her about being a better role model.
Choreographer Debbie Allen is directing the episode, which will air sometime after the third season's Oct. 1 premiere.
Jackson, whose defining role was playing Brandy's best friend Niecy Jackson on UPN's Moesha, recently co-hosted the reality show The Ex-Wives Club with Marla Maples and Angie Everhart.
• Reporting by CYNTHIA WANG
