Acting credits
93
Prolific
Very extensive acting filmography.
Actor
Mark Harmon
Acting
Career Snapshot
ExplainedThese indicators come from TMDB. They are relative signals, not review ratings.
TMDB popularity
3.9
Moderate attention
TMDB internal trend index. Higher usually means more searches and page activity now.
Movies: 46Series: 48Crew credits: 7
TMDB ID: 19728
IMDb ID: nm0001319
Known for: Acting
Born: September 2, 1951
Age: 74
Place of birth: Burbank, California, USA
Gender: Male
Adult content flag: No
Career span: 1944 - 2025
Years active: 82
Average TMDB rating: 6.55
Wikidata: Q296774
Also known as
Thomas Mark Harmon
Other jobs
Executive Producer (4)Director (2)Producer (1)
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.
Photos
Movies
Movies
Movie credits linked with Mark Harmon.
6.9
Freakier Friday
as Ryan
2025 Movie
9.0
NCISverse: The First 1,000
as Self
2024 Movie
7.0
The Wild
as Self
2019 Movie
4.9
Certain Prey
as Lucas Davenport
2011 Movie
7.3
Justice League: Crisis on Two Earths
as Superman (voice)
2010 Movie
5.6
Weather Girl
as Dale
2009 Movie
6.2
Chasing Liberty
as James Foster
2004 Movie
6.6
Freaky Friday
as Ryan
2003 Movie
6.3
Local Boys
as Jim Wesley
2002 Movie
6.6
And Never Let Her Go
as Thomas Capano
2001 Movie
6.3
Crossfire Trail
as Bruce Barkow
2001 Movie
2.5
The Amati Girls
as Lawrence
2001 Movie
6.3
For All Time
as Charles Lattimer
2000 Movie
6.3
I'll Remember April
as John Cooper
1999 Movie
7.2
Fear and Loathing in Las Vegas
as Magazine Reporter
1998 Movie
6.4
Casualties
as Tommy Nance
1997 Movie
The First to Go
as Jeremy Hampton
1997 Movie
6.5
The Last Supper
as Dominant Male
1995 Movie
5.3
Magic in the Water
as Jack Black
1995 Movie
3.8
Original Sins
as Johnathan Franye
1995 Movie
7.1
Natural Born Killers
as Mickey Knox in TV
1994 Movie
6.8
Wyatt Earp
as Sheriff Johnny Behan
1994 Movie
4.3
Cold Heaven
as Alex Davenport
1992 Movie
2.8
Till There Was You
as Frank Flynn
1991 Movie
Series
Series
Series credits linked with Mark Harmon.
7.6
NCIS: Origins
as Older Leroy Jethro Gibbs (voice) (uncredited) • 16 eps
2024 Series
7.7
Joe Montana: Cool Under Pressure
as Self - Narrator (voice) • 6 eps
2022 Series
6.4
The Kelly Clarkson Show
as Self • 1 eps
2019 Series
7.5
All or Nothing: The Michigan Wolverines
as Narrator (voice) • 8 eps
2018 Series
6.7
The American West
as Self • 8 eps
2016 Series
5.3
The Late Late Show with James Corden
as Self • 1 eps
2015 Series
7.3
NCIS: New Orleans
as Leroy Jethro Gibbs • 4 eps
2014 Series
5.7
The Arsenio Hall Show
as Self • 1 eps
2013 Series
4.4
The Bonnie Hunt Show
as Self • 1 eps
2008 Series
4.2
The Megan Mullally Show
as Self - Guest • 1 eps
2006 Series
7.6
NCIS
as Leroy Jethro Gibbs • 435 eps
2003 Series
5.5
Jimmy Kimmel Live!
as Self • 1 eps
2003 Series
7.0
The Legend of Tarzan
as Bob Markham (voice) • 1 eps
2001 Series
7.0
And Never Let Her Go
as Thomas Capano • 2 eps
2001 Series
7.6
Boston Public
Director • 2 eps
2000 Series
8.3
The West Wing
as Simon Donovan • 4 eps
1999 Series
7.4
Family Guy
as Leroy Jethro Gibbs (voice) • 1 eps
1999 Series
8.1
From the Earth to the Moon
as Wally Schirra • 1 eps
1998 Series
4.3
The View
as Self • 1 eps
1997 Series
3.9
The Rosie O'Donnell Show
as Self • 1 eps
1996 Series
7.3
JAG
as Leroy Jethro Gibbs • 2 eps
1995 Series
Charlie Grace
as Charlie Grace • 9 eps
1995 Series
7.2
Chicago Hope
as Jack McNeil • 96 eps
1994 Series
6.2
Harts of the West
1 eps
1993 Series