One of the main stars of the hit 1980s sitcom The Cosby Show has reportedly died tragically. Malcolm-Jamal Warner, who played Theo Huxtable on the iconic television program, has died at 54, according to multiple reports.

Since then, Cosby has stayed out of the public eye, only making the occasional remark, including when his former costar Malcolm-Jamal Warner died on July 20. After Warner drowned in Costa Rica, Cosby's spokesperson Andrew Wyatt told PEOPLE that the actors kept in touch.