Mark Harmon
Born: 1951-09-02 in Burbank, California, USA
Known For: Acting
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.
Filmography
2025
- Freakier Friday as Ryan
2024
- NCIS: Origins as Older Leroy Jethro Gibbs (voice) (uncredited)
- NCISverse: The First 1,000 as Self
2022
- Joe Montana: Cool Under Pressure as Self - Narrator (voice)
2019
- The Kelly Clarkson Show as Self
- The Wild as Self
2018
- All or Nothing: The Michigan Wolverines as Narrator (voice)
2016
- The American West as Self
2015
- The Late Show with Stephen Colbert as Self - Guest
- The Late Late Show with James Corden as Self
2014
- NCIS: New Orleans as Leroy Jethro Gibbs
2013
- The Arsenio Hall Show as Self
2011
- Certain Prey as Lucas Davenport
2010
- Justice League: Crisis on Two Earths as Superman (voice)
2009
- Weather Girl as Dale
2008
- The Bonnie Hunt Show as Self
2006
- The Megan Mullally Show as Self - Guest
2004
- The Tony Danza Show as Self
- Chasing Liberty as James Foster
2003
- NCIS as Leroy Jethro Gibbs
- Jimmy Kimmel Live! as Self
- Freaky Friday as Ryan
2002
- Local Boys as Jim Wesley
- Intimate Portrait: Pam Dawber as Self
2001
- The Legend of Tarzan as Bob Markham (voice)
- Crossfire Trail as Bruce Barkow
- And Never Let Her Go as Thomas Capano
- The Amati Girls as Lawrence
- And Never Let Her Go as Thomas Capano
2000
- Boston Public ... (Director)
- For All Time as Charles Lattimer
1999
- Family Guy as Leroy Jethro Gibbs (voice)
- The West Wing as Simon Donovan
- I'll Remember April as John Cooper
1998
- From the Earth to the Moon as Wally Schirra
- Fear and Loathing in Las Vegas as Magazine Reporter
1997
- The View as Self
- Casualties as Tommy Nance
- The First to Go as Jeremy Hampton
1996
- The Rosie O'Donnell Show as Self
- Strangers as Mark
1995
- JAG as Leroy Jethro Gibbs
- Charlie Grace as Charlie Grace
- The Last Supper as Dominant Male
- Magic in the Water as Jack Black
- Original Sins as Johnathan Franye
1994
- Chicago Hope as Jack McNeil
- Natural Born Killers as Mickey Knox in TV
- Wyatt Earp as Sheriff Johnny Behan
1993
1992
- The Tonight Show with Jay Leno
- Cold Heaven as Alex Davenport
1991
- Reasonable Doubts as Det. Dicky Cobb
- Dillinger as John Dillinger
- Fourth Story as David Shepard
- Till There Was You as Frank Flynn
- Shadow of a Doubt as Charles Spencer
- Long Road Home as Ertie Robertson
1989
- Sweet Bird of Youth as Chance Wayne
- Worth Winning as Taylor Worth
1988
- The Presidio as Jay Austin
- Stealing Home as Billy Wyatt
1987
- Summer School as Mr. Freddy Shoop
- After the Promise as Elmer Jackson
- Dear America: Letters Home from Vietnam as (voice)
1986
- The Deliberate Stranger as Ted Bundy
- Let's Get Harry as Harry
- The Deliberate Stranger as Ted Bundy
- Prince of Bel Air as Robin Prince
1985
- Moonlighting as Sam Crawford
1984
- Tuareg: Desert Warrior as Gacel Sayah
1983
- Intimate Agony as Tommy
1982
- St. Elsewhere as Robert Caldwell
1981
- Entertainment Tonight as Self
- Flamingo Road as Field Carlyle
- Goliath Awaits as Peter Cabot
1980
- The Dream Merchants as Johnny Edge
- Flamingo Road as Fielding Carlyle
1979
- 240-Robert as Thib Thibideaux
- Beyond the Poseidon Adventure as Larry Simpson
1978
- Centennial as Captain John McIntosh
- Comes a Horseman as Billy Joe Meynert
- Sam as Mike Breen
- Little Mo as Norman Brinker
- Getting Married as Howie Lesser
1977
- The Love Boat as Doug Bradbury
- The Hardy Boys / Nancy Drew Mysteries
- Eleanor and Franklin: The White House Years as Robert Dunlap
1976
- Laverne & Shirley
- All's Fair
- Delvecchio as Ronnie Striker
1975
- Saturday Night Live as Self - Host
1974
- Police Woman as Stanski
- Sonic Boom as Student Controller
1973
1972
- Emergency! as Ofcr. Dave Gordon
1968
- Adam-12 as Officer Gus Corbin
1962
1951
- Hallmark Hall of Fame as Charles
1944
- Golden Globe Awards as Self - Nominee