It is with heavy hearts that we must announce legendary comedian Don Rickles has died.

He was 90 years old.

According to TMZ, Rickles died of kidney failure Thursday morning in his Los Angeles home. His wife Barbara was by his side.

Many people will remember Don Rickles as one of the most influential and legendary comedians of all time.

Rickles was one of the few remaining actors from the Golden Era of Hollywood.

Don Rickels became known as an insult comedian when he would respond to hecklers during his show. It got to the point where his fans appreciated the insults more than prepared material, so he would always find a way to work them in to his set.

Rickels always made sure everyone knew he was kidding, saying "If I were to insult people and mean it, that wouldn't be funny."

Rickles had originally aspired to be a serious actor, studying drama at the American Academy of Dramatic Arts with Gene Kelly.

The World War II veteran was great friends with Frank Sinatra, becoming close during the Rat Pack era. Rickles had a famous line when Sinatra came in late to one of his acts, saying "Come on in, Frank. Make yourself at home--hit somebody."

Rickels won his first and only Primetime Emmy in 2007, for outstanding individual performance in a variety or music program in "Mr. Warmth: The Don Rickles Project."

Rickles leaves behind his wife, Barbara, and his two children, Mindy and Larry.

Rest in peace, Don Rickles. You will be dearly missed.