Malcolm-Jamal Warner, the Emmy-nominated actor who played Theo Huxtable on 'The Cosby Show,' has died during a family vacation in Costa Rica. He was 54.

Actor Malcolm-Jamal Warner has died suddenly. He was 54. TMZ reports the Cosby Show star died in a drowning accident, though the outlet provided no further details. PEOPLE confirmed the passing, reporting the actor was “on a family vacation and drowned while swimming.

Mr. Warner, who played the only son of Bill Cosby’s character on the beloved 1980s sitcom, drowned in Costa Rica.