Comedy legend Don Rickles got fed up with Martin Scorsese during filming of “Casino” 30 years ago, the Oscar-winning director revealed.

Before a Tribeca Film Festival screening Thursday at the Beacon Theatre celebrating the anniversary of “Casino,” Scorsese and the film’s star Robert De Niro remembered a night when things with Rickles — aka Mr. Warmth — got particularly heated on set.

“We were in a very tough schedule, and we were all pretty tired,” Scorsese, 82, told the crowd of the Las Vegas night shoots that would start around 11 p.m. 

“But by that point, Don couldn’t take it anymore. He couldn’t, because I was driving him crazy. I’m telling him, ‘Don, I’ll be ready in an hour. Two hours, three hours later, he was still waiting for us. He was dying. ‘Get me out of here!’” 

Scorsese added: “He yelled at one point to the crew, ‘You don’t have to take this from him!’”

Rickles played Billy Sherbert, the head of security for De Niro’s Sam “Ace” Rothstein.

But the director and De Niro mostly shared fond memories of Rickles, who died in 2017. Born in Queens, the comic became a Vegas headliner with the help of friend Frank Sinatra and was eventually synonymous with Sin City.

“Don was really a sweet guy, everybody knew that,” De Niro, 81, said. “And his style — he could be right on when he was acerbic and insulting, but, you know, deep down he was… a sweet guy.”

Scorsese went on to say that Rickles had a point. They were filming at difficult hours in a working casino that even advertised that the famous names were there.

“I was shocked because [the casino] had a kind of a ticker, you know, with a sign outside,” Scorsese said. “It said, ‘Come and watch the shooting: Robert De Niro, Joe Pesci, Don Rickles — appearing now!” 

Scorsese added: “I go in, and my A.D., Joseph Reidy, he looked at me, and he said, ‘Are you ready?’ I said, “Yes, yes. What’s the problem?’ He opened the door. A wall of sound.”

“About 10 o’clock at night. Everybody was playing, gambling, and you couldn’t quite hear each other,” he said. “But by around one in the morning, they quieted down.”