He is an American stand-up comedian and television host. From 1992 to 2009, Leno was the host of NBC's The Tonight Show with Jay Leno. During his tenure, the show held the top ratings position in its time slot on nearly every weekday. Beginning in September 2009, Leno started a primetime talk show, titled The Jay Leno Show, which airs weeknights at 10:00 p.m.Watch his hilarious video at
and http://www.youtube.com/watch?v=O5SJPS_n0HU
He replaced Johnny Carson as host of The Tonight Show in 1992, after having been a regular substitute host for Carson since 1987. Leno continued to perform as a stand-up comedian throughout his tenure on The Tonight Show. In 2004, Leno signed a contract extension with NBC which would keep him as host of The Tonight Show until 2009. Later in 2004, Conan O'Brien signed a contract with NBC under which O'Brien would become the host of The Tonight Show in 2009, replacing Leno at that time.