Jay Leno -- here in May -- began hosting "The Tonight Show" in 1992. In 2009, he launched "The Jay Leno Show," but after seven months and poor ratings, he resumed his post on "The Tonight Show" in 2010.
15 offbeat moments with Jay Leno —
Jay Leno -- here in May -- began hosting "The Tonight Show" in 1992. In 2009, he launched "The Jay Leno Show," but after seven months and poor ratings, he resumed his post on "The Tonight Show" in 2010.
Paul Drinkwater/NBC/NBCU Photo Bank
Leno and sumo wrestler Manny Yarborough on February 16, 2000.
15 offbeat moments with Jay Leno —
Leno and sumo wrestler Manny Yarborough on February 16, 2000.
Paul Drinkwater/NBC/NBCU Photo Bank
Leno asked actor and entrepreneur Paul Newman about adding pet food to his list of Newman's Own products on March 13, 2006.
15 offbeat moments with Jay Leno —
Leno asked actor and entrepreneur Paul Newman about adding pet food to his list of Newman's Own products on March 13, 2006.
NBC Handout
Sports commentator Terry Bradshaw and Leno have a cake fight on December 21.
15 offbeat moments with Jay Leno —
Sports commentator Terry Bradshaw and Leno have a cake fight on December 21.
Paul Drinkwater/NBC/NBCU Photo Bank
Leno with a Kodiak bear cub on May 16.
15 offbeat moments with Jay Leno —
Leno with a Kodiak bear cub on May 16.
Paul Drinkwater/NBC/NBCU Photo Bank
Actor Dane Cook praises actress Charlize Theron before kissing her rear on October 4, 2005.
15 offbeat moments with Jay Leno —
Actor Dane Cook praises actress Charlize Theron before kissing her rear on October 4, 2005.
Paul Drinkwater/WireImage
Texas Gov. George W. Bush and Leno in a Bush mask on October 30, 2000.
15 offbeat moments with Jay Leno —
Texas Gov. George W. Bush and Leno in a Bush mask on October 30, 2000.
PAUL J. RICHARDS/AFP/Getty Images
Leno during a skit on January 8, 1997.
15 offbeat moments with Jay Leno —
Leno during a skit on January 8, 1997.
Margaret Norton/NBC/NBCU Photo Bank
Actor Adam Sander gets hot and heavy with audience member Sharon Kidd of Rogers, Arizona, on September 15, 2005.
15 offbeat moments with Jay Leno —
Actor Adam Sander gets hot and heavy with audience member Sharon Kidd of Rogers, Arizona, on September 15, 2005.
NBC Handout
Leno makes a surprise appearance on Dr. Phil's 500th show on April 22, 2005.
15 offbeat moments with Jay Leno —
Leno makes a surprise appearance on Dr. Phil's 500th show on April 22, 2005.
Mathew Imaging/FilmMagic
Leno hosts the Hollywood Animals segment on February 28, 2007.
15 offbeat moments with Jay Leno —
Leno hosts the Hollywood Animals segment on February 28, 2007.
Paul Drinkwater/NBCU Photo Bank
Actor Cuba Gooding Jr. does a striptease on October 2, 1998.
15 offbeat moments with Jay Leno —
Actor Cuba Gooding Jr. does a striptease on October 2, 1998.
Margaret Norton/NBC/NBCU Photo Bank
Jack the snowboarding chimp on the show on February 20, 2004.
15 offbeat moments with Jay Leno —
Jack the snowboarding chimp on the show on February 20, 2004.
Getty Images
Actress Ellen Cleghorne watches Leno and NFL player Junior Seau wrestle on November 1, 1994.
15 offbeat moments with Jay Leno —
Actress Ellen Cleghorne watches Leno and NFL player Junior Seau wrestle on November 1, 1994.
Margaret Norton/NBC/NBCU Photo Bank
Actor Russell Crowe, left, and "Crocodile Hunter" Steve Irwin with Leno on November 6, 2003.
15 offbeat moments with Jay Leno —
Actor Russell Crowe, left, and "Crocodile Hunter" Steve Irwin with Leno on November 6, 2003.
Kevin Winter/Getty Images