Washington DC, July 22 -- Comedian and actor Bill Cosby mourned the demise of his 'The Cosby Show' co-star and onscreen son Malcolm-Jamal Warner, who passed away at the age of 54, according to E! News.

Warner died in an accidental drowning. More details regarding his demise have not been disclosed yet. The actor played the only son of Bill Cosby's character, Heathcliff Huxtable, in the sitcom from 1984 to 1992.

The 88-year-old's rep, Andrew Wyatt, shared that when Cosby received the call of Warner's demise, it was as shocking and painful for him as when he learned of his own son Ennis Cosby's 1997 murder, which was the result of a failed robbery attempt, reported E! News.

Wyatt also shared that Cosby spoke of his late son and Warner pl...