Mark Harmon
4.2Acting

Mark Harmon

Sep 2, 1951 - Burbank, California, USA

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.

Credits

Cast

Media
Movie1978Getting MarriedHowie Lesser
Movie1998Fear and Loathing in Las VegasMagazine Reporter
Movie2003Freaky FridayRyan
Movie1995Original SinsJohnathan Franye
Movie2010Justice League: Crisis on Two EarthsSuperman (voice)
Movie1979Beyond the Poseidon AdventureLarry Simpson
Movie1988The PresidioJay Austin
Movie1995Magic in the WaterJack Black
Movie1994Wyatt EarpSheriff Johnny Behan
Movie1988Stealing HomeBilly Wyatt
Movie1989Worth WinningTaylor Worth
Movie1995The Last SupperDominant Male
Movie2001Crossfire TrailBruce Barkow
Movie1978Comes a HorsemanBilly Joe Meynert
Movie1987Summer SchoolMr. Freddy Shoop
Movie1987Dear America: Letters Home from Vietnam(voice)
Movie2002Local BoysJim Wesley
Movie2009Weather GirlDale
Movie1989Sweet Bird of YouthChance Wayne
Movie1986The Deliberate StrangerTed Bundy
Movie1987After the PromiseElmer Jackson
Movie2011Certain PreyLucas Davenport
Movie1984Tuareg: Desert WarriorGacel Sayah
Movie2001And Never Let Her GoThomas Capano
Movie1992Cold HeavenAlex Davenport
Movie1986Prince of Bel AirRobin Prince
Movie2000For All TimeCharles Lattimer
Movie1983Intimate AgonyTommy
Movie1991Shadow of a DoubtCharles Spencer
Movie1991DillingerJohn Dillinger
Movie1977Eleanor and Franklin: The White House YearsRobert Dunlap
Movie1991Long Road HomeErtie Robertson
Movie1997CasualtiesTommy Nance
Movie1991Till There Was YouFrank Flynn
Movie1986Let's Get HarryHarry
Movie1980Flamingo RoadFielding Carlyle
Movie1991Fourth StoryDavid Shepard
Movie1978Little MoNorman Brinker
Movie2024NCISverse: The First 1,000Self
Movie2025Freakier FridayRyan
Movie1994Natural Born KillersMickey Knox in TV
Movie1997The First to GoJeremy Hampton
Movie1974Sonic BoomStudent Controller
Movie2019The WildSelf
Movie1999I'll Remember AprilJohn Cooper
Movie2004Chasing LibertyJames Foster
Movie2001The Amati GirlsLawrence
Movie2002Intimate Portrait: Pam DawberSelf
TV Show1982St. ElsewhereRobert Caldwell70
TV Show2004The Tony Danza ShowSelf1
TV Show2003Jimmy Kimmel Live!1
TV Show1996The Rosie O'Donnell ShowSelf1
TV Show1977The Love BoatDoug Bradbury3
TV Show2001The Legend of TarzanBob Markham (voice)1
TV Show1985MoonlightingSam Crawford4
TV Show1981Flamingo Road37
TV Show1997The ViewSelf1
TV Show1979240-RobertThib Thibideaux13
TV Show1992The Tonight Show with Jay Leno1
TV Show1977The Hardy Boys / Nancy Drew Mysteries1
TV Show1998From the Earth to the MoonWally Schirra1
TV Show1976Laverne & Shirley1
TV Show1976All's Fair1
TV Show2003NCISLeroy Jethro Gibbs435
TV Show1995JAGLeroy Jethro Gibbs2
TV Show1978CentennialCaptain John McIntosh12
TV Show1951Hallmark Hall of FameCharles1
TV Show1994Chicago HopeJack McNeil96
TV Show1991Reasonable DoubtsDet. Dicky Cobb44
TV Show1978SamMike Breen6
TV Show1993Harts of the West1
TV Show1995Charlie GraceCharlie Grace9
TV Show1973Ozzie's Girls1
TV Show1980The Dream MerchantsJohnny Edge3
TV Show1975Saturday Night LiveSelf - Host1
TV Show2008The Bonnie Hunt ShowSelf1
TV Show1999The West WingSimon Donovan4
TV Show2015The Late Late Show with James CordenSelf1
TV Show1968Adam-12Officer Gus Corbin1
TV Show1981Goliath AwaitsPeter Cabot2
TV Show2016The American WestSelf8
TV Show1974Police WomanStanski1
TV Show2019The Kelly Clarkson ShowSelf1
TV Show1962The Tonight Show Starring Johnny CarsonSelf1
TV Show2018All or Nothing: The Michigan WolverinesNarrator (voice)8
TV Show2014NCIS: New OrleansLeroy Jethro Gibbs4
TV Show2013The Arsenio Hall ShowSelf1
TV Show1981Entertainment TonightSelf1
TV Show1976DelvecchioRonnie Striker1
TV Show1999Family GuyLeroy Jethro Gibbs (voice)1
TV Show2001And Never Let Her GoThomas Capano2
TV Show2022Joe Montana: Cool Under PressureSelf - Narrator (voice)6
TV Show2006The Megan Mullally ShowSelf - Guest1
TV Show1944Golden Globe AwardsSelf - Nominee3
TV Show2024NCIS: OriginsOlder Leroy Jethro Gibbs (uncredited)17
TV Show1944Golden Globe AwardsSelf1
TV Show1972Emergency!Ofcr. Dave Gordon1
TV Show1974Police WomanPaul Donin1

Crew

Media
Movie2011Certain PreyExecutive ProducerProduction
TV Show2000Boston PublicDirectorDirecting
TV Show1994Chicago HopeDirectorDirecting
TV Show2014NCIS: New OrleansExecutive ProducerProduction
TV Show2003NCISExecutive ProducerProduction
TV Show1995Charlie GraceProducerProduction
TV Show2024NCIS: OriginsExecutive ProducerProduction