Personal Info
Known For:
Acting
Birthday:
September 2, 1951
Place of Birth:
Burbank, California, USA
Social Media
Mark Harmon
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 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
| Year | Movie | Role |
|---|---|---|
| 2025 | Freakier Friday | Ryan |
| 2024 | NCISverse: The First 1,000 | Self |
| 2019 | The Wild | Self |
| 2011 | Certain Prey | Lucas Davenport |
| 2010 | Justice League: Crisis on Two Earths | Superman (voice) |
| 2009 | Weather Girl | Dale |
| 2004 | Chasing Liberty | James Foster |
| 2003 | Freaky Friday | Ryan |
| 2002 | Local Boys | Jim Wesley |
| 2002 | Intimate Portrait: Pam Dawber | Self |
| 2001 | Crossfire Trail | Bruce Barkow |
| 2001 | And Never Let Her Go | Thomas Capano |
| 2001 | The Amati Girls | Lawrence |
| 2000 | For All Time | Charles Lattimer |
| 1999 | I'll Remember April | John Cooper |
| 1998 | Fear and Loathing in Las Vegas | Magazine Reporter |
| 1997 | Casualties | Tommy Nance |
| 1997 | The First to Go | Jeremy Hampton |
| 1995 | Original Sins | Johnathan Franye |
| 1995 | Magic in the Water | Jack Black |
| 1995 | The Last Supper | Dominant Male |
| 1994 | Wyatt Earp | Sheriff Johnny Behan |
| 1994 | Natural Born Killers | Mickey Knox in TV |
| 1992 | Cold Heaven | Alex Davenport |
| 1991 | Shadow of a Doubt | Charles Spencer |
| 1991 | Dillinger | John Dillinger |
| 1991 | Long Road Home | Ertie Robertson |
| 1991 | Till There Was You | Frank Flynn |
| 1991 | Fourth Story | David Shepard |
| 1989 | Worth Winning | Taylor Worth |
| 1989 | Sweet Bird of Youth | Chance Wayne |
| 1988 | The Presidio | Jay Austin |
| 1988 | Stealing Home | Billy Wyatt |
| 1987 | Summer School | Mr. Freddy Shoop |
| 1987 | Dear America: Letters Home from Vietnam | (voice) |
| 1987 | After the Promise | Elmer Jackson |
| 1986 | The Deliberate Stranger | Ted Bundy |
| 1986 | Prince of Bel Air | Robin Prince |
| 1986 | Let's Get Harry | Harry |
| 1984 | Tuareg: Desert Warrior | Gacel Sayah |
| 1983 | Intimate Agony | Tommy |
| 1980 | Flamingo Road | Fielding Carlyle |
| 1979 | Beyond the Poseidon Adventure | Larry Simpson |
| 1978 | Getting Married | Howie Lesser |
| 1978 | Comes a Horseman | Billy Joe Meynert |
| 1978 | Little Mo | Norman Brinker |
| 1977 | Eleanor and Franklin: The White House Years | Robert Dunlap |
| 1974 | Sonic Boom | Student Controller |
| Year | TV Show | Role |
|---|---|---|
| 2024 | NCIS: Origins | Older Leroy Jethro Gibbs (Narrator voice) |
| 2024 | NCIS: Origins | Leroy Jethro (voice, uncredited) |
| 2022 | Joe Montana: Cool Under Pressure | Self - Narrator (voice) |
| 2019 | The Kelly Clarkson Show | Self |
| 2018 | All or Nothing: The Michigan Wolverines | Narrator (voice) |
| 2016 | The American West | Self |
| 2015 | The Late Late Show with James Corden | Self |
| 2014 | NCIS: New Orleans | Leroy Jethro Gibbs |
| 2013 | The Arsenio Hall Show | Self |
| 2008 | The Bonnie Hunt Show | Self |
| 2006 | The Megan Mullally Show | Self - Guest |
| 2004 | The Tony Danza Show | Self |
| 2003 | Jimmy Kimmel Live! | |
| 2003 | NCIS | Leroy Jethro Gibbs |
| 2001 | The Legend of Tarzan | Bob Markham (voice) |
| 2001 | And Never Let Her Go | Thomas Capano |
| 1999 | The West Wing | Simon Donovan |
| 1999 | Family Guy | Leroy Jethro Gibbs (voice) |
| 1998 | From the Earth to the Moon | Wally Schirra |
| 1997 | The View | Self |
| 1996 | The Rosie O'Donnell Show | Self |
| 1995 | JAG | Leroy Jethro Gibbs |
| 1995 | Charlie Grace | Charlie Grace |
| 1994 | Chicago Hope | Jack McNeil |
| 1993 | Harts of the West | |
| 1992 | The Tonight Show with Jay Leno | |
| 1991 | Reasonable Doubts | Det. Dicky Cobb |
| 1985 | Moonlighting | Sam Crawford |
| 1982 | St. Elsewhere | Robert Caldwell |
| 1981 | Flamingo Road | |
| 1981 | Goliath Awaits | Peter Cabot |
| 1981 | Entertainment Tonight | Self |
| 1980 | The Dream Merchants | Johnny Edge |
| 1979 | 240-Robert | Thib Thibideaux |
| 1978 | Centennial | Captain John McIntosh |
| 1978 | Sam | Mike Breen |
| 1977 | The Love Boat | Doug Bradbury |
| 1977 | The Hardy Boys / Nancy Drew Mysteries | |
| 1976 | Laverne & Shirley | |
| 1976 | All's Fair | |
| 1976 | Delvecchio | Ronnie Striker |
| 1975 | Saturday Night Live | Self - Host |
| 1974 | Police Woman | Stanski |
| 1974 | Police Woman | Paul Donin |
| 1973 | Ozzie's Girls | |
| 1972 | Emergency! | Ofcr. Dave Gordon |
| 1968 | Adam-12 | Officer Gus Corbin |
| 1962 | The Tonight Show Starring Johnny Carson | Self |
| 1951 | Hallmark Hall of Fame | Charles |
| 1944 | Golden Globe Awards | Self - Nominee |
| 1944 | Golden Globe Awards | Self |