A legend in the world of comedy has died.

FOX’s Anita Vogel remembers Don Rickles:

Comedy legend and actor Don Rickles died Thursday morning of kidney failure, Fox News has confirmed. He was 90 years old.

“Emmy-award winning iconic comedian Don Rickles passed away at his home Los Angeles this morning (Thursday) as a result of kidney failure,” a statement from his rep sent to Fox News read. “Rickles would have turned 91 on May 8.”

His funeral will be private.

Born in New York City, Rickles served in the U.S. Navy for two years during World War II before he found fame.

He got his big break when his insult comedy began garnering attention. He connected with Frank Sinatra by chiding him during a show and eventually became the go-to comic of the stars.

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Don Rickles has passed away.

A giant loss.

— Billy Crystal (@BillyCrystal) April 6, 2017

90 years with Don Rickles weren’t enough. One of the sweetest and most lovely people I had the pleasure of knowing. We miss you already

— Jimmy Kimmel (@jimmykimmel) April 6, 2017

Greatest Of All Time https://t.co/b7q4wmpFX0

— Jeff Ross (@realjeffreyross) April 6, 2017

One of the funniest, ballsiest comics of all time. RIP Don Rickles. pic.twitter.com/wF9rPQjjVz

— Jim Norton (@JimNorton) April 6, 2017