Thomas Mark Harmon (born September 2, 1951) is an American actor, writer, producer, television director and former
football player. He is best known for playing the lead role of
Leroy Jethro Gibbs on ''
NCIS''.
He has appeared in a wide variety of television roles since the early 1970s, including as Dr. Robert Caldwell on ''
St. Elsewhere'', Detective Dicky Cobb on ''
Reasonable Doubts'', and Dr. Jack McNeil on ''
Chicago Hope''. He also 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''.
Harmon played
Secret Service special agent
Simon Donovan in a four-episode story arc in ''
The West Wing'' in 2002, receiving an
Emmy Award
The Emmy Awards, or Emmys, are an extensive range of awards for artistic and technical merit for the television industry. A number of annual Emmy Award ceremonies are held throughout the year, each with their own set of rules and award categor ...
nomination for the role.
Harmon's character of
NCIS Special Agent Leroy Jethro Gibbs was introduced in a guest starring role in two episodes of ''
JAG''. From 2003 to 2021, Harmon starred in the spinoff ''NCIS'' as the same character.
Early life
Harmon was born in
Burbank, California, the youngest of three children. His parents were
Heisman Trophy-winning football player and broadcaster
Tom Harmon and actress, model, and artist
Elyse Knox (
née Elsie Lillian Kornbrath).
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 Harmon, formerly married to car magnate
John DeLorean. His maternal grandparents were
Austrian immigrants.
College football
After his high school graduation from
Harvard-Westlake School in 1970, Harmon completed a two-year associate degree at
Pierce College in
Los Angeles
Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
.
After his second season at Pierce, 1971, Harmon received offers from major college football programs,
ultimately choosing
UCLA
The University of California, Los Angeles (UCLA) is a public land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school then known as the southern branch of the C ...
over
Oklahoma
Oklahoma ( ; Choctaw language, Choctaw: , ) is a landlocked U.S. state, state in the South Central United States, South Central region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northea ...
,
even though in the previous season,
1971, the
Sooners finished second in the nation, while the
Bruins had stumbled to a 2–7–1 record, placing last in the
Pac-8.
After transferring to the
University of California, Los Angeles
The University of California, Los Angeles (UCLA) is a public university, public Land-grant university, land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school the ...
,
he started as
quarterback
The quarterback (QB) is a position in gridiron football who are members of the offensive side of the ball and mostly line up directly behind the Lineman (football), offensive line. In modern American football, the quarterback is usually consider ...
for the
1972 and
1973 Bruins.
During his first game, his UCLA team produced a stunning upset of the two-time defending national champion
Nebraska Cornhuskers.
The Bruins were an eighteen-point home underdog to the top-ranked Huskers but won 20–17 on a late field goal by
Efren Herrera at
L.A. Coliseum.
In his
senior year, Harmon received the
National Football Foundation Award for All-Round Excellence.
During his two years as quarterback in coach
Pepper Rodgers'
wishbone offense, UCLA compiled a 17–5 record (). Harmon was UCLA's starting quarterback for two seasons, but he was not picked in the
1974 NFL draft.
Harmon graduated ''
cum laude'' from UCLA in 1974 with a
B.A. in
Communications.
He was inducted into the inaugural class of the Pierce College Athletic Hall of Fame in 2010.
Career
After college, Harmon considered pursuing a career in advertising or law.
["] Harmon started his career in business as a merchandising director, but soon decided to switch to acting.
He spent much of his career portraying law enforcement and medical personnel. One of his first national TV appearances (other than as an athlete) was in a commercial for
Kellogg's Product 19 cereal with his father,
Tom Harmon, its longstanding TV spokesman. Thanks to his sister Kristin's in-laws,
Ozzie Nelson and
Harriet Nelson, he landed his first job as an actor in an episode of ''
Ozzie's Girls.'' This was followed by guest roles in episodes of ''
Adam-12'', ''
Police Woman'', and ''
Emergency!'' in mid-1975. He also performed in "905-Wild", a
backdoor pilot episode for a series about two L.A. County Animal Control Officers which did not sell. Producer/creator
Jack Webb, who was the packager of both series, later cast Harmon in ''
Sam'', a short-lived 1978 series about an
LAPD officer and his
K-9 partner. Before this, Harmon received an
Emmy nomination for Outstanding Supporting Actor in a Miniseries or a Movie for his performance as
Robert Dunlap in the television film ''
Eleanor and Franklin: The White House Years''.
In 1978, he appeared in three episodes of the mini-series, ''
Centennial'', as Captain John MacIntosh, an honorable Union cavalry officer.
During the mid- to late-1970s, Harmon made guest appearances on TV series, including ''
Laverne & Shirley'', ''
Delvecchio'', ''
The Hardy Boys/Nancy Drew Mysteries'', and had supporting roles in the feature films ''
Comes a Horseman'' (1978) and ''
Beyond the Poseidon Adventure'' (1979). He then landed a co-starring role on the 1979 action series ''
240-Robert'' as Deputy Dwayne Thibideaux. The series centered around the missions of the Los Angeles County Sheriff's Department Emergency Services Detail, but was also short-lived.
In 1980, 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. Despite initially good ratings, the series was canceled after two seasons. Following its cancellation, he landed the role of Dr. Robert Caldwell on the series ''
St. Elsewhere'' in 1983. 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 (the character's subsequent off-screen death from
AIDS would be mentioned two years later). In the mid-1980s, Harmon also became the spokesperson for
Coors Regular beer, appearing in television commercials for them.
Harmon's career reached several other high points in 1986. In January, he was named ''
People
The term "the people" refers to the public or Common people, common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. I ...
'' magazine's
Sexiest Man Alive. Following his departure from ''St. Elsewhere'' in February, he played the lead in the television films ''
Prince of Bel Air'', co-starring with
Kirstie Alley, and ''
The Deliberate Stranger'', in which he portrayed the real-life
serial killer Ted Bundy. With his career blossoming, he played a role in the 1986 theatrical film ''
Let's Get Harry'' and the lead role in the 1987 comedy ''
Summer School'', again co-starring with
Kirstie Alley and alongside future ''
JAG'' and ''
NCIS'' alum
Patrick Labyorteaux. Returning briefly to episodic television in 1987, Harmon had a limited engagement on the series ''
Moonlighting'', playing
Cybill Shepherd's love interest Sam Crawford for four episodes. He then starred in the 1987 television film ''After the Promise''. In 1988, he co-starred with
Sean Connery and
Meg Ryan in the 1988 feature film ''
The Presidio'', and also opposite
Jodie Foster in the film ''
Stealing Home''. After his 1989 comedy ''
Worth Winning'', he returned to television, appearing in various television films.
Harmon's next regular television role would be as Chicago police detective Dickie Cobb for two seasons (1991–1993) on the
NBC series ''
Reasonable Doubts''. In 1993, he appeared in one episode in the role of a
rodeo clown on the
CBS comedy/western series ''
Harts of the West'' with future ''NCIS'' castmate
Sean Murray.
In 1995, Harmon starred in the
ABC series ''
Charlie Grace'', in which he portrayed a private investigator. The series lasted only one season, after which he returned to ensemble medical shows on the series ''
Chicago Hope'', in which he played Dr. Jack McNeil from 1996 to 2000. He also portrayed astronaut
Wally Schirra in one episode of the 1998 mini-series ''
From the Earth to the Moon
''From the Earth to the Moon: A Direct Route in 97 Hours, 20 Minutes'' () is an 1865 novel by Jules Verne. It tells the story of the Baltimore Gun Club, a post-American Civil War society of weapons enthusiasts, and their attempts to build an en ...
''.
In 2003, Harmon had a supporting role in the remake of the comedy film ''
Freaky Friday''.
Harmon has also starred in several stage productions in
Los Angeles
Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
and
Toronto
Toronto ( , locally pronounced or ) is the List of the largest municipalities in Canada by population, most populous city in Canada. It is the capital city of the Provinces and territories of Canada, Canadian province of Ontario. With a p ...
. At the Cast Theatre in Los Angeles, he performed in ''Wrestlers'' and ''The Wager''. In the late 1980s he was part of the cast of the
Canadian premiere of ''Key Exchange''. Several productions of
''Love Letters'' provided him the opportunity to play alongside his wife
Pam Dawber.
''NCIS''
In May 2002, Harmon portrayed
Secret Service special agent Simon Donovan on ''
The West Wing'' in a four-episode story arc. The role gained him his second Emmy Award nomination, exactly 25 years after his first.
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. Starting that September, Harmon has starred as Gibbs in the CBS drama ''
NCIS'', a role which has earned him six nominations at the
People's Choice Awards including a win for Favorite TV Crime Drama Actor in 2017. During his time on the show, he was reunited with three of his former ''Chicago Hope'' co-stars,
Rocky Carroll,
Lauren Holly, and
Jayne Brook. Since 2008, he has also been a producer and executive producer.
In the fourth episode of the show's nineteenth season, Harmon's Gibbs exited the series as a regular, an exit set in motion by the events of the previous
season finale.
Other activities

Harmon received the 2,482nd star of the
Hollywood Walk of Fame on October 1, 2012.
In 2014, Harmon started a production company called Wings Productions to produce ''
NCIS: New Orleans''. As of 2018, Harmon works as a producer for a new CBS series, based on author
John Sandford's best-selling ''Prey'' novels, which have sold more than 30 million copies worldwide. The last 10 have reached No. 1 on ''
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of ...
'' best-seller list.
Harmon also directed two episodes of ''
Chicago Hope'' in 1999 and 2000,
and two episodes of ''
Boston Public'' in 2002.
In 2023 Harmon, with retired NCIS Special Agent Leon Carroll Jr., released ''Ghosts of Honolulu: A Japanese spy, a Japanese American spy hunter, and the untold story of Pearl Harbor''. Harmon also narrates the audio book.
Personal life
Harmon is the son of football player
Tom Harmon and actress
Elyse Knox. His sisters are
Kelly, an actress and model, and
Kristin, an actress and painter. Kristin died of a heart attack on April 27, 2018.
Harmon has been married to actress
Pam Dawber since March 21, 1987.
The couple has two sons. His son Sean played a young Gibbs in several ''NCIS'' episodes. They maintain a low profile and rarely appear in public with their children. 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, Harmon filed for custody of his nephew Sam, Kristin's son, on the grounds that she was incapable of good parenting. Sam's psychiatrist testified that the thirteen-year-old boy depicted his mother as a dragon and complained about her mood swings and how she prevented him from being with his siblings. Harmon later dropped the custody bid.
In 1988, Harmon was part owner of a
minor league baseball
Minor League Baseball (MiLB) is a professional baseball organization below Major League Baseball (MLB), constituted of teams affiliated with MLB clubs. It was founded on September 5, 1901, in response to the growing dominance of the National Le ...
team, the
San Bernardino Spirit, the same season
Ken Griffey Jr. played for the team before his major league call-up to the
Seattle Mariners the next season. 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, Harmon saved a teenage boy involved in a car accident outside his
Brentwood home. The passenger suffered severe burns, but survived his injuries.
Filmography
Film
Television
Awards and nominations
References
Further reading
*
External links
*
*
*
*
{{DEFAULTSORT:Harmon, Mark
1951 births
Living people
American football quarterbacks
American male film actors
American male television actors
American male voice actors
American people of Austrian descent
Mark Harmon
Thomas Mark Harmon (born September 2, 1951) is an American actor, writer, producer, television director and former American football, football player. He is best known for playing the lead role of Leroy Jethro Gibbs on ''NCIS (TV series), NCIS'' ...
Los Angeles Pierce College people
Harvard-Westlake School alumni
Male actors from Burbank, California
People from Brentwood, Los Angeles
Pierce Brahmas football players
Players of American football from Burbank, California
UCLA Bruins football players
University of California, Los Angeles alumni
20th-century American male actors
21st-century American male actors