Acting credits
93
Prolific
Very extensive acting filmography.

Acting
These indicators come from TMDB. They are relative signals, not review ratings.
Acting credits
93
Prolific
Very extensive acting filmography.
TMDB popularity
3.9
Moderate attention
TMDB internal trend index. Higher usually means more searches and page activity now.
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
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.




Movie credits linked with Mark Harmon.
as Ryan
as Self
as Self
as Lucas Davenport
as Superman (voice)
as Dale
as James Foster
as Ryan
as Jim Wesley
as Thomas Capano
as Bruce Barkow
as Lawrence
as Charles Lattimer
as John Cooper
as Magazine Reporter
as Tommy Nance
as Jeremy Hampton
as Dominant Male
as Jack Black
as Johnathan Franye
as Mickey Knox in TV
as Sheriff Johnny Behan
as Alex Davenport
as Frank Flynn
Series credits linked with Mark Harmon.
as Older Leroy Jethro Gibbs (voice) (uncredited) • 16 eps
as Self - Narrator (voice) • 6 eps
as Self • 1 eps
as Narrator (voice) • 8 eps
as Self • 8 eps
as Self • 1 eps
as Leroy Jethro Gibbs • 4 eps
as Self • 1 eps
as Self • 1 eps
as Self - Guest • 1 eps
as Leroy Jethro Gibbs • 435 eps
as Self • 1 eps
as Bob Markham (voice) • 1 eps
as Thomas Capano • 2 eps
Director • 2 eps
as Simon Donovan • 4 eps
as Leroy Jethro Gibbs (voice) • 1 eps
as Wally Schirra • 1 eps
as Self • 1 eps
as Self • 1 eps
as Leroy Jethro Gibbs • 2 eps
as Charlie Grace • 9 eps
as Jack McNeil • 96 eps
1 eps