Upon detailing how Rickles first appeared on his talk show in 2006, Kimmel once again broke down.
"Dear Jimmy, thank you so much for the lovely frame of you and I", one read. "We lost someone that I love very much today". "He didn't know what this was; he knew Tonight Show and Letterman, and that's it", Kimmel said. He grew up listening to Rickles as a kid in Las Vegas, and eventually became friends with the legendary comedian.
Sandler recalled a moment, almost 20 years ago, when he and actor Steve Buscemi were eating at a restaurant in NY and Rickles came up to their table, just to rib them a bit.
90 years with Don Rickles weren't enough.
Kimmel thought this was amusing because he believed Don Rickles should be the one boosting him, not the other way around. He was awarded a star on the Hollywood Walk of Fame in 2000, and in 2008, he won an Emmy for the TV documentary Mr. Warmth: The Don Rickles Project.
Colbert talked about the "incredible honor" of meeting Rickles backstage at the Emmys. The episode also included a highlight package of Kimmel and Rickles' best moments together, and Kimmel reminiscing about Rickles' life and career with Adam Sandler.
The Jimmy Kimmel Live host, who was clearly overwhelmed by the news of the comedian's death, started off his monologue informing viewers that he is going to cry.
Rickles, who said he devised his brand of mockery-based humor because he was no good at telling traditional jokes, had developed a bacterial infection in recent months that led him to cancel a number of performances.
"He was called 'The Merchant of Venom, ' but in truth, he was one of the kindest, caring and most sensitive human beings we have ever known", actor Bob Newhart and his wife, Ginnie Newhart, said in a statement. "He's probably the greatest talk-show guest of all time".
Stars of the entertainment world paid tribute to him. Upon receiving Rickles' condolences for SNL's cancellation, Meyers assured him it was still on the air, to which Rickles replied, "Ugh, a guy can dream". Our thoughts are with his family.
Mark Wahlberg said "Don Rickles was an absolute legend, my favourite comedian, and also my friend. A dear pal that we will all sorely miss".