TV legend David Letterman made a surprise appearance on NBC’s “Tonight Show” on Monday night during host Jimmy Fallon’s ...

But it also left Jay Leno, the longtime host of the still top-rated Tonight Show, out of a job earlier than he would have liked. About 20 years earlier, NBC had endured another unpleasant transfer ...

Jay Leno and his wife, Mavis, chat with ET's Kevin Frazier at the Los Angeles premiere of 'Unfrosted,' streaming May 3 on Netflix. Conan O'Brien Returns to 'The Tonight Show' for First Time Since ...