Hugh Grant
Groucho Marx
David Letterman is the first host of the Late Show on CBS. He originated the show in 1993, when he left NBC.
Entertainment Tonight - 1981 is rated/received certificates of: Australia:G Australia:PG (some episodes)
Letterman has hosted late-night shows on two networks for 30 years. From 1982 to 1993, his "Late Night With David Letterman" aired immediately after "The Tonight Show" on NBC. In August 1993, he moved his act to CBS as host of "The Late Show with David Letterman," and he has been there ever since.
Not Tonight Henry - 1960 is rated/received certificates of: Finland:(Banned) (1965) UK:(Banned) (1961)
Zero, because David Letterman is not on the Tonight Show. Conan is.
David Letterman never hosted The Tonight Show.
Groucho Marx
Steve Allen
In Melbourne Tonight - 1996 is rated/received certificates of: Australia:PG
North Tonight - 1980 is rated/received certificates of: UK:U
Sports Tonight - 1993 is rated/received certificates of: Australia:G
Just for Tonight - 1918 is rated/received certificates of: USA:Approved
Tonight in That Building - 1991 is rated/received certificates of: Italy:T
Heaven Tonight - 1990 is rated/received certificates of: Australia:M
Micallef Tonight - 2003 is rated/received certificates of: Australia:M
Somewhere Tonight - 2011 is rated/received certificates of: Netherlands:AL