TV
The Tonight Show is an American late-night talk show currently broadcast from the NBC studios in Rockefeller Center in New York City, the show's original location and airing on NBC since 1954. The series has been hosted, in consecutive order, by six comedians: Steve Allen (1954–1957), Jack Paar (1957–1962), Johnny Carson, Jay Leno, Conan O'Brien, and Jimmy Fallon (2014–present), and had several recurring guest hosts including Ernie Kovacs during the Steve Allen era and Joan Rivers, Garry Shandling and Jay Leno during Johnny Carson's stewardship, although the practice has been abandoned since Carson's departure, with hosts preferring reruns to showcasing potential rivals. The Tonight Show is the world's longest-running talk show, and the longest-running, regularly scheduled entertainment program in the United States. It is the third-longest-running show on NBC, after the news-and-talk shows Today and Meet the Press.