Richard Lewis, dubbed "The Prince of Pain," was famed for delving into his neuroses through frenzied diatribes, often clad entirely in black. He notably held a recurring role in the series "Curb Your Enthusiasm."

US comedian Richard Lewis, known for his frenzied diatribes and all-black attire, earning him the moniker "The Prince of Pain," has passed away at 76, as confirmed by his publicist Jeff Abraham on Wednesday.

 Lewis, who disclosed his Parkinson's disease diagnosis in 2023, succumbed to a heart attack at his Los Angeles residence, Abraham revealed.

"His wife, Joyce Lapinsky, expresses gratitude for the outpouring of love, friendship, and support, and requests privacy during this period," stated Abraham in a written release.

 native of Brooklyn, Lewis began performing stand-up comedy in the early 1970s while working a day job in advertising. By the end of the decade, he had risen to the top of his generation of comedians.

Throughout the 1980s, he was a regular on late-night talk shows. He starred opposite Jamie Lee Curtis in the ABC TV comedy "Anything But Love". He went on to appear in several films in the 1990's, most notably starring in "Robin Hood: Men in Tights."

In later years, he was best known for his portrayal of a version of himself as Larry David's friend on "Curb Your Enthusiasm," in which the two men bickered relentlessly.

"Richard and I were born three days apart in the same hospital and for most of my life he's been like a brother to me," David said in a statement. "He had that rare combination of being the funniest person and also the sweetest. But today he made me sob and for that I'll never forgive him."