Bill Cosby is mourning the death of his longtime co-star and on-screen son, Malcolm-Jamal Warner, who died at the age of 54 while on a family vacation in Costa Rica. Warner, who rose to fame as Theo Huxtable on "The Cosby Show," died on Sunday, July 20, as he left behind a legacy celebrated by his fans and co-stars.

Warner, who starred alongside Cosby on the beloved family sitcom "The Cosby Show," died from an apparent drowning on Sunday, July 20, after he was allegedly swept away by a current while in the Caribbean Sea, the country's Judicial Investigation Agency confirmed to USA TODAY on July 22.