Judd Apatow made a short documentary of the friendship between Bob Newhart and Don Rickles. It doesn’t seem like they’d be friends, but seeing them together, it obviously works.
NewYorker: Bob Newhart and Don Rickles
NewYorker: Bob Newhart and Don Rickles
“I love that they became friends because they both played Vegas and neither wanted to cheat on their wives,” Apatow said.