
Burbank, California, USA
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.

as Self

as Leroy Jethro Gibbs
2003

as Leroy Jethro Gibbs (voice)
1999

as Self
1962

as Self - Guest
2015

as Self
2019

as Self - Host
1975

as Leroy Jethro Gibbs
1995

as Simon Donovan
1999

as Self
2015

as Self
1997

as Doug Bradbury
1977

as Self - Nominee
1944
as Self
2019

as Ryan
2025

as Self
2024

as Self
2019

as Lucas Davenport
2011

as Superman (voice)
2010

as Dale
2009

as James Foster
2004

as Ryan
2003

as Jim Wesley
2002
as Self
2002

as Thomas Capano
2001

as Bruce Barkow
2001

as Lawrence
2001

as Charles Lattimer
2000

as John Cooper
1999

as Magazine Reporter
1998

as Tommy Nance
1997

as Jeremy Hampton
1997

as Dominant Male
1995

as Jack Black
1995

as Johnathan Franye
1995

as Mickey Knox in TV
1994

as Sheriff Johnny Behan
1994

as Alex Davenport
1992
as Self
1 ep.

as Leroy Jethro Gibbs
435 episodes

as Leroy Jethro Gibbs (voice)
1 episodes

as Self
1 episodes

as Self - Guest
1 episodes

as Self
1 episodes

as Self - Host
1 episodes

as Leroy Jethro Gibbs
2 episodes

as Simon Donovan
4 episodes

as Self
1 episodes

as Self
1 episodes

as Doug Bradbury
3 episodes

as Self - Nominee
3 episodes

as Self
1 episodes

as Jack McNeil
96 episodes

as Officer Gus Corbin
1 episodes

as Ofcr. Dave Gordon
1 episodes

as Leroy Jethro Gibbs
4 episodes

as Robert Caldwell
59 episodes

1 episodes

as Sam Crawford
4 episodes

as Stanski
1 episodes

1 episodes
as Self
1 episodes

1 episodes