'Cosby Show' Star Breaks Silence on Death of Malcolm-Jamal Warner With Rare Video originally appeared on Parade. Keshia Knight Pulliam has spoken out following the tragic death of her Cosby Show co-star and on-screen big brother, Malcolm-Jamal Warner.

Keshia Knight Pulliam has made a promise to her late television brother, Malcolm-Jamal Warner. Knight Pulliam, who as a child star played Rudy Huxtable on “The Cosby Show,” posted a tribute to Warner on social media over the weekend.