34 Facts About Mark Harmon

Thomas Mark Harmon was born on September 2,1951 and is an American actor, writer, producer, television director and former football player.

Mark Harmon is perhaps best known for playing the lead role of Leroy Jethro Gibbs on NCIS.

Mark Harmon has appeared in a wide variety of television roles since the early 1970s, including Dr Robert Caldwell on St Elsewhere, Detective Dicky Cobb on Reasonable Doubts, and Dr Jack McNeil on Chicago Hope.

Mark Harmon starred in such films as Summer School, Prince of Bel Air, Stealing Home, Wyatt Earp, Fear and Loathing in Las Vegas, Crossfire Trail, Local Boys, Freaky Friday, and Chasing Liberty.

From 2003 to 2021, Mark Harmon starred in the spinoff NCIS as the same character.

Mark Harmon was born in Burbank, California, the youngest of three children.

Mark Harmon's parents were Heisman Trophy-winning football player and broadcaster Tom Harmon and actress, model, and artist Elyse Knox.

Mark Harmon had two older sisters, the late actress and painter Kristin Nelson, who was divorced from the late singer Rick Nelson, and actress and model Kelly Mark Harmon, formerly married to car magnate John DeLorean.

Mark Harmon was UCLA's starting quarterback for two seasons, but he was not picked in the 1974 NFL draft.

Mark Harmon was inducted into the inaugural class of the Pierce College Athletic Hall of Fame in 2010.

Mark Harmon started his career in business as a merchandising director, but soon decided to switch to acting.

Mark Harmon spent much of his career portraying law enforcement and medical personnel.

Mark Harmon then landed a co-starring role on the 1979 action series 240-Robert as Deputy Dwayne Thibideaux.

In 1980, Mark Harmon gained a regular role in the prime time soap opera Flamingo Road, in which he played Fielding Carlisle, the husband of Morgan Fairchild's character.

Mark Harmon appeared in the show for almost three seasons before leaving in early 1986 when his character contracted HIV through unprotected intercourse, one of the first instances where a major recurring television character contracted the virus.

Mark Harmon then starred in the 1987 television film After the Promise.

In 1995, Mark Harmon starred in the ABC series Charlie Grace, in which he portrayed a private investigator.

Mark Harmon portrayed astronaut Wally Schirra in one episode of the 1998 mini-series From the Earth to the Moon.

In 2003, Mark Harmon had a supporting role in the remake of the comedy film Freaky Friday.

Mark Harmon has starred in several stage productions in Los Angeles and Toronto.

In May 2002, Mark Harmon portrayed Secret Service special agent Simon Donovan on The West Wing in a four-episode story arc.

Donald P Bellisario, the creator of JAG and NCIS, saw him on The West Wing and had Harmon appear in a guest starring role in two episodes of JAG in April 2003, where Harmon was introduced as the character of NCIS agent Leroy Jethro Gibbs.

Mark Harmon received the 2,482nd star of the Hollywood Walk of Fame on October 1,2012.

In 2014, Mark Harmon started a production company called Wings Productions to produce NCIS: New Orleans.

Mark Harmon directed two episodes of Chicago Hope in 1999 and 2000, and two episodes of Boston Public in 2002.

In 2023 Mark Harmon, with retired NCIS Special Agent Leon Carroll Jr.

Mark Harmon is the son of football player Tom Mark Harmon and actress Elyse Knox.

Mark Harmon's sisters are Kelly, an actress and model, and Kristin, an actress and painter.

Mark Harmon has been married to actress Pam Dawber since March 21,1987.

Mark Harmon was the brother-in-law of Ricky Nelson and John DeLorean and is the uncle of actress Tracy Nelson and singers Matthew and Gunnar Nelson of the rock duo Nelson.

In 1987, Mark Harmon filed for custody of his nephew Sam, Kristin's son, on the grounds that she was incapable of good parenting.

In 1988, Mark Harmon was part owner of a minor league baseball team, the San Bernardino Spirit, the same season Ken Griffey Jr.

Mark Harmon used the team and their home field, Fiscalini Field, for the opening and closing scenes of the film in which he was starring, Stealing Home.

In 1996, Mark Harmon saved a teenage boy involved in a car accident outside his Brentwood home.