Mark Harmon
- Known for
- Acting
- Born
- Sep 2, 1951 (age 75)
- Place of birth
- Burbank, California, USA
- Credits
- 100
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
Fear and Loathing in Las Vegas
1998Movie
Magazine Reporter
Family Guy
1999TV
Leroy Jethro Gibbs (voice)
Freaky Friday
2003Movie
Ryan
Natural Born Killers
1994Movie
Mickey Knox in TV
NCIS
2003TV
Leroy Jethro Gibbs
Wyatt Earp
1994Movie
Sheriff Johnny Behan
Filmography
Freakier Friday
2025Movie
Ryan
NCIS: Origins
2024TV
Older Leroy Jethro Gibbs (voice) (uncredited), Older Leroy Jethro Gibbs (uncredited), Older Leroy Jethro Gibbs
NCISverse: The First 1,000
2024Movie
Self
Joe Montana: Cool Under Pressure
2022TV
Self - Narrator (voice)
The Kelly Clarkson Show
2019TV
Self
The Wild
2019Movie
Self
All or Nothing: The Michigan Wolverines
2018TV
Narrator (voice)
The American West
2016TV
Self
The Late Show with Stephen Colbert
2015TV
Self - Guest
The Late Late Show with James Corden
2015TV
Self
NCIS: New Orleans
2014TV
Leroy Jethro Gibbs
The Arsenio Hall Show
2013TV
Self
Steve Harvey
2012TV
Self
Certain Prey
2011Movie
Lucas Davenport
Justice League: Crisis on Two Earths
2010Movie
Superman (voice)
Weather Girl
2009Movie
Dale
The Bonnie Hunt Show
2008TV
Self
The Megan Mullally Show
2006TV
Self - Guest
The Tony Danza Show
2004TV
Self
Chasing Liberty
2004Movie
James Foster
NCIS
2003TV
Leroy Jethro Gibbs
Freaky Friday
2003Movie
Ryan
Jimmy Kimmel Live!
2003TV
Self
Local Boys
2002Movie
Jim Wesley
Intimate Portrait: Pam Dawber
2002Movie
Self
The Legend of Tarzan
2001TV
Bob Markham (voice)
And Never Let Her Go
2001Movie
Thomas Capano
And Never Let Her Go
2001TV
Thomas Capano
Crossfire Trail
2001Movie
Bruce Barkow
The Amati Girls
2001Movie
Lawrence
For All Time
2000Movie
Charles Lattimer
The West Wing
1999TV
Simon Donovan
I'll Remember April
1999Movie
John Cooper
Family Guy
1999TV
Leroy Jethro Gibbs (voice)
Fear and Loathing in Las Vegas
1998Movie
Magazine Reporter
From the Earth to the Moon
1998TV
Wally Schirra
The View
1997TV
Self
Casualties
1997Movie
Tommy Nance
The First to Go
1997Movie
Jeremy Hampton
The Rosie O'Donnell Show
1996TV
Self
Strangers
1996TV
Mark
JAG
1995TV
Leroy Jethro Gibbs
Charlie Grace
1995TV
Charlie Grace
The Last Supper
1995Movie
Dominant Male
Magic in the Water
1995Movie
Jack Black
Original Sins
1995Movie
Johnathan Franye
Chicago Hope
1994TV
Jack McNeil
Natural Born Killers
1994Movie
Mickey Knox in TV
Wyatt Earp
1994Movie
Sheriff Johnny Behan
Harts of the West
1993TV
Cold Heaven
1992Movie
Alex Davenport
The Tonight Show with Jay Leno
1992TV
Reasonable Doubts
1991TV
Det. Dicky Cobb
Till There Was You
1991Movie
Frank Flynn
Shadow of a Doubt
1991Movie
Charles Spencer
Long Road Home
1991Movie
Ertie Robertson
Fourth Story
1991Movie
David Shepard
Dillinger
1991Movie
John Dillinger
Worth Winning
1989Movie
Taylor Worth
Sweet Bird of Youth
1989Movie
Chance Wayne
Stealing Home
1988Movie
Billy Wyatt
The Presidio
1988Movie
Jay Austin
After the Promise
1987Movie
Elmer Jackson
Dear America: Letters Home from Vietnam
1987Movie
(voice)
Summer School
1987Movie
Freddy Shoop
Let's Get Harry
1986Movie
Harry
The Deliberate Stranger
1986Movie
Ted Bundy
The Deliberate Stranger
1986TV
Ted Bundy
Prince of Bel Air
1986Movie
Robin Prince
Moonlighting
1985TV
Sam Crawford
Tuareg: Desert Warrior
1984Movie
Gacel Sayah
Intimate Agony
1983Movie
Tommy
St. Elsewhere
1982TV
Robert Caldwell
Goliath Awaits
1981TV
Peter Cabot
Entertainment Tonight
1981TV
Self
Flamingo Road
1981TV
Field Carlyle
Flamingo Road
1980Movie
Fielding Carlyle
The Dream Merchants
1980TV
Johnny Edge
240-Robert
1979TV
Thib Thibideaux
Beyond the Poseidon Adventure
1979Movie
Larry Simpson
Comes a Horseman
1978Movie
Billy Joe Meynert
Centennial
1978TV
Captain John McIntosh
Little Mo
1978Movie
Norman Brinker
Getting Married
1978Movie
Howie Lesser
Sam
1978TV
Mike Breen
The Love Boat
1977TV
Doug Bradbury
Eleanor and Franklin: The White House Years
1977Movie
Robert Dunlap
The Hardy Boys / Nancy Drew Mysteries
1977TV
All's Fair
1976TV
Delvecchio
1976TV
Ronnie Striker
Laverne & Shirley
1976TV
Saturday Night Live
1975TV
Self - Host
Police Woman
1974TV
Stanski, Paul Donin
Sonic Boom
1974Movie
Student Controller
Ozzie's Girls
1973TV
Emergency!
1972TV
Ofcr. Dave Gordon
Adam-12
1968TV
Officer Gus Corbin
The Tonight Show Starring Johnny Carson
1962TV
Self
Hallmark Hall of Fame
1951TV
Charles
Golden Globe Awards
1944TV
Self - Nominee, Self