Skip to content
Join free
Mark Harmon
Actor

Mark Harmon

2 Sep 1951Born
75Age
80Credits
Burbank, California, USABirthplace

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.

Read the full biography

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

Filmography

  1. 2025Freakier FridayFilm: Ryan
  2. 2024NCIS: OriginsSeries: Older Leroy Jethro Gibbs (voice) (uncredited), Older Leroy Jethro Gibbs (uncredited) (16 episodes)
  3. 2018All or Nothing: The Michigan WolverinesSeries: Narrator (voice) (8 episodes)
  4. 2014NCIS: New OrleansSeries: Leroy Jethro Gibbs (4 episodes)
  5. 2011Certain PreyFilm: Lucas Davenport
  6. 2010Justice League: Crisis on Two EarthsFilm: Superman (voice)
  7. 2009Weather GirlFilm: Dale
  8. 2004Chasing LibertyFilm: James Foster
  9. 2003NCISSeries: Leroy Jethro Gibbs (435 episodes)
  10. 2003Freaky FridayFilm: Ryan
  11. 2002Local BoysFilm: Jim Wesley
  12. 2001The Legend of TarzanSeries: Bob Markham (voice) (1 episode)
  13. 2001And Never Let Her GoFilm: Thomas Capano
  14. 2001And Never Let Her GoSeries: Thomas Capano (2 episodes)
  15. 2001Crossfire TrailFilm: Bruce Barkow
  16. 2001The Amati GirlsFilm: Lawrence
  17. 2000Boston PublicSeries: Director (2 episodes)
  18. 2000For All TimeFilm: Charles Lattimer
  19. 1999The West WingSeries: Simon Donovan (4 episodes)
  20. 1999I'll Remember AprilFilm: John Cooper
  21. 1999Family GuySeries: Leroy Jethro Gibbs (voice) (1 episode)
  22. 1998Fear and Loathing in Las VegasFilm: Magazine Reporter
  23. 1998From the Earth to the MoonSeries: Wally Schirra (1 episode)
  24. 1997CasualtiesFilm: Tommy Nance
  25. 1997The First to GoFilm: Jeremy Hampton
  26. 1996StrangersSeries: Mark (1 episode)
  27. 1995JAGSeries: Leroy Jethro Gibbs (2 episodes)
  28. 1995Charlie GraceSeries: Charlie Grace (9 episodes)
  29. 1995The Last SupperFilm: Dominant Male
  30. 1995Magic in the WaterFilm: Jack Black
  31. 1995Original SinsFilm: Johnathan Franye
  32. 1994Chicago HopeSeries: Jack McNeil, Director (96 episodes)
  33. 1994Natural Born KillersFilm: Mickey Knox in TV
  34. 1994Wyatt EarpFilm: Sheriff Johnny Behan
  35. 1993Harts of the WestSeries (1 episode)
  36. 1992Cold HeavenFilm: Alex Davenport
  37. 1991Reasonable DoubtsSeries: Det. Dicky Cobb (44 episodes)
  38. 1991Till There Was YouFilm: Frank Flynn
  39. 1991Shadow of a DoubtFilm: Charles Spencer
  40. 1991Long Road HomeFilm: Ertie Robertson
  41. 1991Fourth StoryFilm: David Shepard
  42. 1991DillingerFilm: John Dillinger
  43. 1989Worth WinningFilm: Taylor Worth
  44. 1989Sweet Bird of YouthFilm: Chance Wayne
  45. 1988Stealing HomeFilm: Billy Wyatt
  46. 1988The PresidioFilm: Jay Austin
  47. 1987After the PromiseFilm: Elmer Jackson
  48. 1987Dear America: Letters Home from VietnamFilm: (voice)
  49. 1987Summer SchoolFilm: Freddy Shoop
  50. 1986Let's Get HarryFilm: Harry
  51. 1986The Deliberate StrangerFilm: Ted Bundy
  52. 1986The Deliberate StrangerSeries: Ted Bundy (2 episodes)
  53. 1986Prince of Bel AirFilm: Robin Prince
  54. 1985MoonlightingSeries: Sam Crawford (4 episodes)
  55. 1984Tuareg: Desert WarriorFilm: Gacel Sayah
  56. 1983Intimate AgonyFilm: Tommy
  57. 1982St. ElsewhereSeries: Robert Caldwell (59 episodes)
  58. 1981Goliath AwaitsSeries: Peter Cabot (2 episodes)
  59. 1981Flamingo RoadSeries: Field Carlyle (37 episodes)
  60. 1980Flamingo RoadFilm: Fielding Carlyle
  61. 1980The Dream MerchantsSeries: Johnny Edge (3 episodes)
  62. 1979240-RobertSeries: Thib Thibideaux (13 episodes)
  63. 1979Beyond the Poseidon AdventureFilm: Larry Simpson
  64. 1978Comes a HorsemanFilm: Billy Joe Meynert
  65. 1978CentennialSeries: Captain John McIntosh (12 episodes)
  66. 1978Little MoFilm: Norman Brinker
  67. 1978Getting MarriedFilm: Howie Lesser
  68. 1978SamSeries: Mike Breen (6 episodes)
  69. 1977The Love BoatSeries: Doug Bradbury (3 episodes)
  70. 1977Eleanor and Franklin: The White House YearsFilm: Robert Dunlap
  71. 1977The Hardy Boys / Nancy Drew MysteriesSeries (1 episode)
  72. 1976All's FairSeries (1 episode)
  73. 1976DelvecchioSeries: Ronnie Striker (1 episode)
  74. 1976Laverne & ShirleySeries (1 episode)
  75. 1974Police WomanSeries: Stanski, Paul Donin (1 episode)
  76. 1974Sonic BoomFilm: Student Controller
  77. 1973Ozzie's GirlsSeries (1 episode)
  78. 1972Emergency!Series: Ofcr. Dave Gordon (1 episode)
  79. 1968Adam-12Series: Officer Gus Corbin (1 episode)
  80. 1951Hallmark Hall of FameSeries: Charles (1 episode)

Biography and credits from TMDB. This website uses TMDB and the TMDB APIs but is not endorsed, certified, or otherwise approved by TMDB.