Don Rickles, a stand-up comedy legend and pioneer of insult humor, has died at the age of 90, his reps confirmed Thursday. 

Paul Shefrin, his longtime publicist and friend, said Rickles died Thursday of kidney failure at his Los Angeles home.

Rickles would have turned 91 on May 8,” his publicist said in a statement. 

Rickles was born in New York City on May 8, 1926. He served in the Navy in World War II and studied acting at New York’s Academy of Dramatic Arts. Rickles went on to have a career that spanned six decades, with his uproarious live shows continuing into his late 80s. 

An honorary member of Frank Sinatra’s Rat Pack, he was a frequent quest on late-night talk shows, with Johnny Carson affectionately nicknaming him “Mr. Warmth” for his caustic brand of humor. 

Onscreen, Rickles was best known for films such as “Run Silent, Run Deep,” “The Rat Race,” “Kelly’s Heroes” and “Casino,” and he gave voice to Mr. Potato Head in Pixar’s “Toy Story” films.

For more than half a century, "Mr. Warmth" headlined casinos and nightclubs from Las Vegas to Atlantic City. N.J., and appeared often on late-night TV talk shows.

Rickles is survived by his wife of 52 years, Barbara, as well as their daughter Mindy Mann, her husband Ed, and Rickles’ two grandchildren, Ethan and Harrison Mann.”

Funeral services will be private.

Photos: Remembering Don Rickles