Warner, who played son Theodore “Theo” Huxtable on “The Cosby Show,” drowned in Costa Rica on Sunday at the age of 54.

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.

The beloved actor died at 54 while on vacation with his family in Costa Rica. Learn more about his sudden passing and cause of death here.