The first couple's chat about the romantic holiday made a surprising detour, according to the "Tonight Show" host.

Tina Fey and Amy Poehler burst from behind the curtain to interrupt Jimmy Fallon ’s “Tonight Show” monologue on Wednesday.

David Letterman made a surprise cameo on The Tonight Show Starring Jimmy Fallon on Feb. 10, interrupting Fallon's monologue ...

It was a throwback evening on NBC since Paul Shaffer and longtime members of his backing band filled in for the Roots as they ...

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

“The guy’s in the wrong business! He’s in the comedy business, he should laugh,” Fallon joked about his current executive producer. But when Fallon took the stage, he did the impossible and got a ...

After singing the updated version of "Asshole," Leary and Fallon sat down to discuss the song. "I don't know if people are ...

On Tuesday, Feb. 11, the Tesla CEO joined President Donald Trump for a press conference at the White House's Oval Office.

Live' veterans participated in a "Tonight Show Joke Off," a riff on SNL's "Weekend Update" segment during which they battled it out for the best punchlines.

Brown shared how he managed to dunk over Donovan Mitchell in the Dunk Contest -- and how he did so without even practicing ...

Among the laps, Hurts, running back Saquon Barkley, and the entire Eagles starting offensive line found themselves as guests ...

Former “Weekend Update” anchors, Tina Fey, Amy Poehler, Seth Meyers and Jimmy Fallon, reunited on “The Tonight Show” ...