Late Show with David Letterman is an American late-night talk show hosted by David Letterman on CBS. The show debuted on August 30, 1993, and is produced by Letterman's production company, Worldwide Pants Incorporated and CBS Television Studios. The show's music director and band-leader of the house band, the CBS Orchestra, is Paul Shaffer. The head writer is Matt Roberts and the announcer is Alan Kalter. Of the major U.S. late-night programs, Late Show ranks second in cumulative average viewers over time and third in number of episodes over time.The show leads other late night shows in ad revenue with $271 million in 2009.