David Letterman is best known for his dry and sarcastic humor as a popular talk show host and for his popular late night television program Late Show with David Letterman and is the longest serving talk show host, second to none, having hosted over 6,000 shows! Inspired and mentored by Johnny Carson, 'The Late Show with David Letterman' went on to make TV Guides top 50 shows of all time! Aside from hosting the talk shows, Letterman has had a successful career as a producer for shows such as 'Everybody Loves Raymond,' and became a popular influence for many others to come after him such as Stephen Colbert, Seth Myers and Jimmy Fallon.