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.

In the wake of Malcolm-Jamal Warner's sudden death at age 54, Bill Cosby shared a personal tribute to the actor who portrayed his son, Theo Huxtable, on the long-running NBC sitcom “The Cosby Show.” Warner died Sunday after an accidental drowning while swimming off the Caribbean coast of Costa Rica during a family vacation.