Malcolm-Jamal Warner, who played Theo Huxtable on "The Cosby Show," has died at 54, with Bill Cosby reflecting on their relationship and Warner's professionalism on set.

Jamal Warner, best known for his role on "The Cosby Show," has died in an accidental drowning in Costa Rica, where he was vacationing with his family, officials there said. He was 54. Warner drowned Sunday afternoon at a beach in Cocles de Limón on Costa Rica's Caribbean coast,