The term 'Allen Successor' refers to the succession of late night talk show hosts after the retirement of comedian and actor Steve Allen. The first successor was Jay Paar, who hosted the show from 1957 to 1962. He was followed by Johnny Carson, who hosted the show from 1962 to 1992. After Carson's retirement, comedian and actor David Letterman took over the show from 1992 to 2015. Finally, comedian and actor Jimmy Fallon succeeded Letterman in 2015.