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