Here is a look at the life of late-night talk show host David Letterman.
Personal: Birth date: April 12, 1947
Birth place: Indianapolis, Indiana
Birth name: David Michael Letterman
Father: Harry Letterman, a florist
Mother: Dorothy (Hofert) Letterman Mengering
Marriages: Regina Lasko (March 19, 2009-present); Michelle Cook (1969-1977, divorced)
Children: with Regina: Harry Joseph, November 03, 2003
Education: Ball State University, B.A., 1969
Other Facts: Letterman is the founder of the production company Worldwide Pants, which produces "Late Show with David Letterman."
Is a co-owner of Rahal Letterman Lanigan Racing.
"Late Night with David Letterman" was nominated for 35 Emmy Awards and won five. "Late Show with David Letterman" has been nominated for 72 Emmy Awards and has won nine.
Timeline: 1969 - Begins working as an announcer and weekend weatherman at WLWI (now WTHR), an ABC affiliate in Indianapolis, Indiana.
1975 - Moves to Los Angeles and begins performing stand-up at the Comedy Store. Later he is hired by Jimmie Walker, star of the CBS sitcom "Good Times," as a writer.
1978 - Appears on Mary Tyler Moore's variety show, "Mary."
November 1978 - Makes the first of 22 appearances on "The Tonight Show" hosted by Johnny Carson. Letterman also serves as a guest host on "The Tonight Show" several times.
June 23, 1980-October 24, 1980 - Hosts "The David Letterman Show," a daytime talk show on NBC.
February 1, 1982-June 25, 1993 - Hosts "Late Night with David Letterman" on NBC.
September 18, 1985 - Premiere of the "Top Ten" list.
May 1992 - Johnny Carson announces his retirement and speculation begins that Letterman will replace him.
January 1993 - After it is announced that Jay Leno will take Johnny Carson's place, Letterman announces he will be leaving NBC for CBS, and expresses anger over what he regards as NBC's poor treatment of him.
August 30, 1993 -present - Host of "Late Show with David Letterman."
March 27, 1995 - Hosts the Academy Awards.
January 14, 2000 - Letterman undergoes quintuple bypass surgery.
September 17, 2001 - Is the first late-night talk show host to return to air after the September 11 terrorist attacks. Instead of starting the show with a humorous monologue, Letterman mourns those lost and praises the city's firefighters and police officers. His first guest, CBS anchor Dan Rather, breaks down in tears during the broadcast.