Mark Harmon
Acting
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
Acting100
tvNCIS: Origins
2024
Older Leroy Jethro Gibbs (voice) (uncredited) / Older Leroy Jethro Gibbs (uncredited)
tvBlack Tar
2022
Ira Monroe
tvJoe Montana: Cool Under Pressure
2022
Self - Narrator (voice)
tvAll or Nothing: The Michigan Wolverines
2018
Narrator (voice)
tvThe Late Show with Stephen Colbert
2015
Self - Guest
tvNCIS: New Orleans
2014
Leroy Jethro Gibbs
movieCertain Prey
2011
Lucas Davenport
movieJustice League: Crisis on Two Earths
2010
Superman (voice)
tvThe Megan Mullally Show
2006
Self - Guest
movieChasing Liberty
2004
James Foster
tvNCIS
2003
Leroy Jethro Gibbs
movieLocal Boys
2002
Jim Wesley
tvThe Legend of Tarzan
2001
Bob Markham (voice)
movieAnd Never Let Her Go
2001
Thomas Capano
tvAnd Never Let Her Go
2001
Thomas Capano
movieCrossfire Trail
2001
Bruce Barkow
movieThe Amati Girls
2001
Lawrence
movieFor All Time
2000
Charles Lattimer
tvThe West Wing
1999
Simon Donovan
movieI'll Remember April
1999
John Cooper
tvFamily Guy
1999
Leroy Jethro Gibbs (voice)
movieFear and Loathing in Las Vegas
1998
Magazine Reporter
tvFrom the Earth to the Moon
1998
Wally Schirra
tvThe View
1997
Self
movieCasualties
1997
Tommy Nance
movieThe First to Go
1997
Jeremy Hampton
tvStrangers
1996
Mark
tvJAG
1995
Leroy Jethro Gibbs
tvCharlie Grace
1995
Charlie Grace
movieThe Last Supper
1995
Dominant Male
movieMagic in the Water
1995
Jack Black
movieOriginal Sins
1995
Johnathan Franye
tvChicago Hope
1994
Jack McNeil
movieNatural Born Killers
1994
Mickey Knox in TV
movieWyatt Earp
1994
Sheriff Johnny Behan
movieCold Heaven
1992
Alex Davenport
tvReasonable Doubts
1991
Det. Dicky Cobb
movieTill There Was You
1991
Frank Flynn
movieShadow of a Doubt
1991
Charles Spencer
movieLong Road Home
1991
Ertie Robertson
movieFourth Story
1991
David Shepard
movieDillinger
1991
John Dillinger
movieWorth Winning
1989
Taylor Worth
movieSweet Bird of Youth
1989
Chance Wayne
movieStealing Home
1988
Billy Wyatt
movieThe Presidio
1988
Jay Austin
movieAfter the Promise
1987
Elmer Jackson
movieSummer School
1987
Mr. Freddy Shoop
movieThe Deliberate Stranger
1986
Ted Bundy
tvThe Deliberate Stranger
1986
Ted Bundy
moviePrince of Bel Air
1986
Robin Prince
tvMoonlighting
1985
Sam Crawford
movieTuareg: Desert Warrior
1984
Gacel Sayah
tvSt. Elsewhere
1982
Robert Caldwell
tvGoliath Awaits
1981
Peter Cabot
tvFlamingo Road
1981
Field Carlyle
movieFlamingo Road
1980
Fielding Carlyle
tvThe Dream Merchants
1980
Johnny Edge
tv240-Robert
1979
Thib Thibideaux
movieBeyond the Poseidon Adventure
1979
Larry Simpson
movieComes a Horseman
1978
Billy Joe Meynert
tvCentennial
1978
Captain John McIntosh
movieLittle Mo
1978
Norman Brinker
movieGetting Married
1978
Howie Lesser
tvSam
1978
Mike Breen
tvThe Love Boat
1977
Doug Bradbury
Eleanor and Franklin: The White House Years
1977
Robert Dunlap
tvDelvecchio
1976
Ronnie Striker
tvSaturday Night Live
1975
Self - Host
tvPolice Woman
1974
Stanski / Paul Donin
movieSonic Boom
1974
Student Controller
tvEmergency!
1972
Ofcr. Dave Gordon
tvAdam-12
1968
Officer Gus Corbin
tvHallmark Hall of Fame
1951
Charles
tvGolden Globe Awards
1944
Self - Nominee / Self
Production5
tvNCIS: Origins
2024
Executive Producer
tvNCIS: New Orleans
2014
Executive Producer
movieCertain Prey
2011
Executive Producer
tvNCIS
2003
Executive Producer
tvCharlie Grace
1995
Producer
Directing2
tvBoston Public
2000
Director
tvChicago Hope
1994
Director