Legendary comedian Don Rickles died Thursday at age 90. Rickles passed away at his L.A. home due to kidney failure, his publicist announced.

Greg Gutfeld paid tribute (video above) on "The Five," saying he "worshipped" Rickles as a youngster and watched any program or roast in which Rickles was appearing.

"He was the master of the insult, one of the funniest people that ever lived," said Gutfeld, recalling a funny story about the first time he met Rickles.

Watch the Fox News tribute video below and check out some of the reaction from the comedy world. 

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