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

John Oliver wasn't the only late night icon to crash this week. "The Tonight Show" started Monday off with a surprise ...

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

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

Paul Shaffer isn’t done with late night just yet! The musician is heading to Studio 6B in Rockefeller Center with The World’s ...

On the “Tonight Show Starring Jimmy Fallon,” the host poked fun at the Chiefs on Monday night. This came in the form of a ...

Feb. 11 (UPI) -- David Letterman joined Jimmy Fallon during his monologue on The Tonight Show Monday. "Is this the 23rd hour of the Today show?" asked the former Late Show host, feigning confusion, ...

On Feb. 10, David Letterman stopped by “The Tonight Show Starring Jimmy Fallon” while his former bandleader, Paul Shaffer, ...

Fallon was riffing with Paul Shaffer and the World’s Most Dangerous Band, Letterman’s longtime sidekick and band from his time hosting CBS’ Late Show from 1982 to 2015 — Shaffer and co were filling in ...

A Mark Consuelos against Mario Lopez for a Sexiest Man title battle is brewing between the two men as they share words with each other.

Why did Tim think he was funny? Well, a cool thing happens in 8th grade when the cool kid makes a joke — even a lame joke — ...

Around the 3:47 mark of Jimmy Fallon's monologue on Monday's The Tonight Show, David Letterman came out of retirement to crash the party. "Is this the 23rd hour of the Today Show?" he quipped, before ...