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Mark Harmon

Mark Harmon

Actor · Born 1951-09-02 · Burbank, California, USA

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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 UCL…

Movies & TV Shows

  1. Fear and Loathing in Las Vegas (1998) — Magazine Reporter
  2. Family Guy (1999) — Leroy Jethro Gibbs (voice)
  3. Freaky Friday (2003) — Ryan
  4. Natural Born Killers (1994) — Mickey Knox in TV
  5. NCIS (2003) — Leroy Jethro Gibbs
  6. Wyatt Earp (1994) — Sheriff Johnny Behan
  7. Justice League: Crisis on Two Earths (2010) — Superman (voice)
  8. Freakier Friday (2025) — Ryan
  9. Chasing Liberty (2004) — James Foster
  10. The West Wing (1999) — Simon Donovan
  11. Saturday Night Live (1975) — Self - Host
  12. NCIS: New Orleans (2014) — Leroy Jethro Gibbs
  13. Moonlighting (1985) — Sam Crawford
  14. JAG (1995) — Leroy Jethro Gibbs
  15. The Presidio (1988) — Jay Austin
  16. The Late Show with Stephen Colbert (2015) — Self - Guest
  17. The Last Supper (1995) — Dominant Male
  18. Summer School (1987) — Mr. Freddy Shoop
  19. Jimmy Kimmel Live! (2003) — Self
  20. The Love Boat (1977) — Doug Bradbury
  21. The Late Late Show with James Corden (2015) — Self
  22. Beyond the Poseidon Adventure (1979) — Larry Simpson
  23. From the Earth to the Moon (1998) — Wally Schirra
  24. The View (1997) — Self
  25. The Legend of Tarzan (2001) — Bob Markham (voice)
  26. The Tonight Show with Jay Leno (1992)
  27. St. Elsewhere (1982) — Robert Caldwell
  28. The Tonight Show Starring Johnny Carson (1962) — Self
  29. Chicago Hope (1994) — Jack McNeil
  30. Comes a Horseman (1978) — Billy Joe Meynert
  31. Laverne & Shirley (1976)
  32. The Kelly Clarkson Show (2019) — Self
  33. Weather Girl (2009) — Dale
  34. NCIS: Origins (2024) — Older Leroy Jethro Gibbs (voice) (uncredited)
  35. Stealing Home (1988) — Billy Wyatt
  36. Emergency! (1972) — Ofcr. Dave Gordon
  37. Let's Get Harry (1986) — Harry
  38. Adam-12 (1968) — Officer Gus Corbin
  39. Worth Winning (1989) — Taylor Worth
  40. Crossfire Trail (2001) — Bruce Barkow

Directed

  1. Chicago Hope (1994) — Director
  2. Boston Public (2000) — Director