Mark Harmon
Known for Acting · 99 credits
- Born
- 1951-09-02 (age 74)
- Place of birth
- Burbank, California, USA
- Also known as
- Thomas Mark Harmon
Biography
Thomas Mark Harmon (born September 2, 1951) is an American actor, producer and director. He is known for playing the lead role of Leroy Jethro Gibbs on NCIS (2003-2021), 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. Since 2008, he has also been a producer and executive producer of the show as well as its' spinoff series NCIS: New Orleans. His character of NCIS special agent Leroy Jethro Gibbs was introduced in a guest starring role in two episodes of JAG, and continued on the spinoff show NCIS.
He had a recurring role as Secret Service special agent Simon Donovan in a four-episode story arc in The West Wing in 2002, for which he received an Emmy Award nomination.
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 and Harriet Nelson, he landed his first job as an actor in an episode of Ozzie's Girls.
He has been starring in television and film since the mid-1970s, after a career as a collegiate football player with the UCLA Bruins.
He's been married to actress Pam Dawber since 1987 and they have 2 sons. His son, actor Sean Harmon, had a recurring role as a young Leeroy Jethro Gibbs on NCIS.
Known For
TV Shows (51)
NCIS
2003
as Leroy Jethro Gibbs
Family Guy
1999
as Leroy Jethro Gibbs (voice)
The Tonight Show Starring Johnny Carson
1962
as Self
The Late Show with Stephen Colbert
2015
as Self - Guest
JAG
1995
as Leroy Jethro Gibbs
The Kelly Clarkson Show
2019
as Self
The West Wing
1999
as Simon Donovan
Saturday Night Live
1975
as Self - Host
Golden Globe Awards
1944
as Self - Nominee
The Love Boat
1977
as Doug Bradbury
Chicago Hope
1994
as Jack McNeil
The Late Late Show with James Corden
2015
as Self
Emergency!
1972
as Ofcr. Dave Gordon
The View
1997
as Self
Adam-12
1968
as Officer Gus Corbin
St. Elsewhere
1982
as Robert Caldwell
NCIS: New Orleans
2014
as Leroy Jethro Gibbs
Jimmy Kimmel Live!
2003
as Self
Moonlighting
1985
as Sam Crawford
Police Woman
1974
as Stanski / Paul Donin
The Tonight Show with Jay Leno
1992
Laverne & Shirley
1976
The Hardy Boys / Nancy Drew Mysteries
1977
The Tony Danza Show
2004
as Self
NCIS: Origins
2024
as Older Leroy Jethro Gibbs (voice) (uncredited) / Older Leroy Jethro Gibbs (uncredited)
From the Earth to the Moon
1998
as Wally Schirra
The Legend of Tarzan
2001
as Bob Markham (voice)
The Bonnie Hunt Show
2008
as Self
The Megan Mullally Show
2006
as Self - Guest
Centennial
1978
as Captain John McIntosh
Entertainment Tonight
1981
as Self
Flamingo Road
1981
as Field Carlyle
Reasonable Doubts
1991
as Det. Dicky Cobb
Charlie Grace
1995
as Charlie Grace
240-Robert
1979
as Thib Thibideaux
The American West
2016
as Self
Delvecchio
1976
as Ronnie Striker
The Rosie O'Donnell Show
1996
as Self
Harts of the West
1993
Hallmark Hall of Fame
1951
as Charles
The Arsenio Hall Show
2013
as Self
All's Fair
1976
Goliath Awaits
1981
as Peter Cabot
The Dream Merchants
1980
as Johnny Edge
Joe Montana: Cool Under Pressure
2022
as Self - Narrator (voice)
Ozzie's Girls
1973
Strangers
1996
as Mark
And Never Let Her Go
2001
as Thomas Capano
The Deliberate Stranger
1986
as Ted Bundy
Sam
1978
as Mike Breen
All or Nothing: The Michigan Wolverines
2018
as Narrator (voice)
Movies (48)
Freakier Friday
2025
as Ryan
Freaky Friday
2003
as Ryan
Natural Born Killers
1994
as Mickey Knox in TV
Fear and Loathing in Las Vegas
1998
as Magazine Reporter
Wyatt Earp
1994
as Sheriff Johnny Behan
Chasing Liberty
2004
as James Foster
Justice League: Crisis on Two Earths
2010
as Superman (voice)
Summer School
1987
as Mr. Freddy Shoop
The Presidio
1988
as Jay Austin
Beyond the Poseidon Adventure
1979
as Larry Simpson
The Last Supper
1995
as Dominant Male
Comes a Horseman
1978
as Billy Joe Meynert
Dear America: Letters Home from Vietnam
1987
as (voice)
The Deliberate Stranger
1986
as Ted Bundy
After the Promise
1987
as Elmer Jackson
Crossfire Trail
2001
as Bruce Barkow
Stealing Home
1988
as Billy Wyatt
Dillinger
1991
as John Dillinger
Sweet Bird of Youth
1989
as Chance Wayne
Let's Get Harry
1986
as Harry
NCISverse: The First 1,000
2024
as Self
Worth Winning
1989
as Taylor Worth
And Never Let Her Go
2001
as Thomas Capano
Weather Girl
2009
as Dale
Prince of Bel Air
1986
as Robin Prince
Magic in the Water
1995
as Jack Black
Sonic Boom
1974
as Student Controller
Cold Heaven
1992
as Alex Davenport
Certain Prey
2011
as Lucas Davenport
Casualties
1997
as Tommy Nance
Tuareg: Desert Warrior
1984
as Gacel Sayah
For All Time
2000
as Charles Lattimer
Flamingo Road
1980
as Fielding Carlyle
The Amati Girls
2001
as Lawrence
Little Mo
1978
as Norman Brinker
Original Sins
1995
as Johnathan Franye
Local Boys
2002
as Jim Wesley
I'll Remember April
1999
as John Cooper
The Wild
2019
as Self
Fourth Story
1991
as David Shepard
Intimate Agony
1983
as Tommy
Eleanor and Franklin: The White House Years
1977
as Robert Dunlap
Till There Was You
1991
as Frank Flynn
Shadow of a Doubt
1991
as Charles Spencer
The First to Go
1997
as Jeremy Hampton
Long Road Home
1991
as Ertie Robertson
Getting Married
1978
as Howie Lesser
Intimate Portrait: Pam Dawber
2002
as Self
About Mark Harmon
Thomas Mark Harmon (born September 2, 1951) is an American actor, producer and director. He is known for playing the lead role of Leroy Jethro Gibbs on NCIS (2003-2021), 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. Since 2008, he has also been a producer and executive producer of the show as well as its' spinoff series NCIS: New Orleans. His character of NCIS special agent Leroy Jethro Gibbs was introduced in a guest starring role in two episodes of JAG, an… With 99 credits spanning from 1944 to 2025, Mark Harmon has appeared in 48 films and 51 TV shows.
Fans searching for Mark Harmon movies, Mark Harmon filmography, or the latest projects starring Mark Harmon can stream many of these titles on Bowood.TV, free and in HD, with no subscription required.
Most Popular Mark Harmon Movies
- Freakier Friday (2025) — as Ryan
- Freaky Friday (2003) — as Ryan
- Natural Born Killers (1994) — as Mickey Knox in TV
- Fear and Loathing in Las Vegas (1998) — as Magazine Reporter
- Wyatt Earp (1994) — as Sheriff Johnny Behan
Where to Watch Mark Harmon Films
Most Mark Harmon movies and series are available to stream on Bowood.TV in full HD, completely free and without signup. Browse the complete filmography above to jump directly to any title. For more films and the latest web series featuring Mark Harmon, check our movies catalogue and browse page.