Letterman, of course, has history with “The Tonight Show.” He appeared on the show multiple times when Carson was host, many ...

The former 'Tonight Show' host will make a cameo in an upcoming episode of the comedy. By Rick Porter Television Writer Allen and Leno are also longtime friends, going back to their days as young ...

"Is this the 23rd hour of The Today Show?,” Letterman asked as he wandered onto the stage to greet Jimmy Fallon.

If you see a lantern-jawed dude wearing a hat and fake mustache at next week’s Cars on 5th, don’t get your hopes up: It’s not Jay Leno. He promises. The former The Tonight Show host and ...

Tell your parents to crank up the VCR because the greatest comedy stars of 1993 are teaming up for an epic night of dad jokes ...

John Oliver’s not the only talk show host who can drop in on another show unexpectedly. Last night, the great David Letterman made a rare appearance on the Tonight ... go with Jay Leno instead.