David Letterman is 73 years and 10 month(s) old. He was born in 12 Apr, 1947. David Letterman is probably one of the most famous names when it comes to American entertainment and Television. He is a television icon, a host, an actor, a director and a producer, writer as well as a comedian; but above all, he is the host of one of the most successful TV shows of all time; Late Night with David Letterman. He is known for his funny and witty interviews with many known faces in the world; and has been a host of the show for 33 successful years. On a list of TV Guide??'?s 50 Greatest TV Stars of All Time; he made to the 45th position, and it is through television that he has got such a massive popularity and fame in the world.