(FILES) US talk show host and comedian Jimmy Fallon arrives for "The Albies" hosted by the Clooney Foundation for Justice at the New York Public Library in New York, on September 26, 2024. America's late night talk shows once were appointment viewing, but with ratings tanking and ad revenues plummeting, their coveted place on the small screen is in question. The hosts of yesterday and today -- comedians from Johnny Carson and Jay Leno to Jimmy Fallon and Jon Stewart -- are household names, and their jokes were once mandatory conversation starters at the water cooler. (Photo by John Lamparski / AFP) (Photo by JOHN LAMPARSKI/AFP via Getty Images)