MH
Mark Harmon
Actor, Producer, DirectorBorn September 2, 1951 (73 years)
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.
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.
Movies & Shows on Plex
Filmography
| 2025 | Freakier Friday · as Ryan |
| 2024 | NCIS: Origins (TV Series) · as Older Leroy Jethro Gibbs (voice) (uncredited) |
| 2019 | Seize & Secure: The Battle for La Fière · as Narrator |
| 2018 | All or Nothing: The Michigan Wolverines (TV Series) · as Narrator (voice) |
| 2014 | NCIS: New Orleans (TV Series) · as Leroy Jethro Gibbs |
| 2011 | Certain Prey · as Lucas Davenport |
| 2010 | I Am · as Cast |
| 2010 | Justice League: Crisis on Two Earths · as Clark Kent / Superman (voice) |
| 2009 | Weather Girl · as Dale |
| 2004 | Retrosexual: The '80s (TV Series) · as Cast |
| 2004 | Chasing Liberty · as James Foster |
| 2003 | NCIS (TV Series) · as Leroy Jethro Gibbs |
| 2003 | Freaky Friday · as Ryan |
| 2003 | Jimmy Kimmel Live! (TV Series) |
| 2002 | Local Boys · as Jim Wesley |
| 2001 | The Legend of Tarzan (TV Series) · as Bob Markham (voice) |
| 2001 | And Never Let Her Go · as Thomas Capano |
| 2001 | And Never Let Her Go (TV Series) · as Thomas Capano |
| 2001 | Crossfire Trail · as Bruce Barkow |
| 2000 | For All Time · as Charles Lattimer |
| 2000 | The Amati Girls · as Lawrence |
| 1999 | The West Wing (TV Series) · as Simon Donovan |
| 1999 | I'll Remember April · as John Cooper |
| 1999 | Family Guy (TV Series) · as Leroy Jethro Gibbs (voice) |
| 1999 | Gaia Symphony II · as Voice Over |
| 1998 | Fear and Loathing in Las Vegas · as Magazine Reporter |
| 1998 | From the Earth to the Moon (TV Series) · as Wally Schirra |
| 1997 | Casualties · as Tommy Nance |
| 1997 | The First to Go · as Jeremy Hampton |
| 1996 | Adventures from the Book of Virtues (TV Series) · as Ulysses |
| 1996 | Strangers (TV Series) · as Mark |
| 1995 | JAG (TV Series) · as Leroy Jethro Gibbs |
| 1995 | Charlie Grace (TV Series) · 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 (TV Series) · as Jack Mcneil |
| 1994 | Natural Born Killers · as Mickey Knox In Tv |
| 1994 | Wyatt Earp · as Sheriff Johnny Behan |
| 1993 | Harts of the West (TV Series) |
| 1992 | The Tonight Show with Jay Leno (TV Series) |
| 1991 | Cold Heaven · as Alex Davenport |
| 1991 | Reasonable Doubts (TV Series) · 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 | The Deliberate Stranger (TV Series) · as Ted Bundy |
| 1986 | Prince of Bel Air · as Robin Prince |
| 1985 | Moonlighting (TV Series) · as Sam Crawford |
| 1984 | Tuareg: The Desert Warrior · as Gacel Sayah |
| 1983 | Intimate Agony · as Tommy |
| 1982 | St. Elsewhere (TV Series) · as Robert Caldwell |
| 1981 | Goliath Awaits (TV Series) · as Peter Cabot |
| 1980 | The Dream Merchants (TV Series) · as Johnny Edge |
| 1980 | Flamingo Road (TV Series) |
| 1979 | 240-Robert (TV Series) · as Thib Thibideaux |
| 1979 | Beyond the Poseidon Adventure · as Larry Simpson |
| 1978 | Comes a Horseman · as Billy Joe Meynert |
| 1978 | Centennial (TV Series) · as Captain John Mcintosh |
| 1978 | Little Mo · as Norman Brinker |
| 1978 | Getting Married · as Howie Lesser |
| 1977 | The Love Boat (TV Series) · as Doug Bradbury |
| 1977 | Eleanor and Franklin: The White House Years · as Robert Dunlap |
| 1977 | The Hardy Boys / Nancy Drew Mysteries (TV Series) |
| 1976 | All's Fair (TV Series) |
| 1976 | Delvecchio (TV Series) · as Ronnie Striker |
| 1976 | Laverne & Shirley (TV Series) |
| 1975 | Sonic Boom · as Student Controller |
| 1974 | Police Woman (TV Series) · as Stanski |
| 1973 | Ozzie's Girls (TV Series) |
| 1973 | Police Story (TV Series) · as Officer Hazelton |
| 1972 | Emergency! (TV Series) · as Ofcr. Dave Gordon |
| 1968 | Adam-12 (TV Series) · as Officer Gus Corbin |
| 1951 | Hallmark Hall Of Fame (TV Series) · as Charles |