Mark Harmon
Acting
104
Acting Credits
2
Directed
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...
Known For
Filmography
Freakier Friday
2025
as Ryan
NCISverse: The First 1,000
2024
as Self
NCIS: Origins
2024
as Older Leroy Jethro Gibbs (voice) (uncredited)
NCIS: Origins
2024
as Older Leroy Jethro Gibbs (uncredited)
NCIS: Origins
2024
as Older Leroy Jethro Gibbs
Joe Montana: Cool Under Pressure
2022
as Self - Narrator (voice)
The Wild
2019
as Self
The Kelly Clarkson Show
2019
as Self
All or Nothing: The Michigan Wolverines
2018
as Narrator (voice)
The American West
2016
as Self
The Late Late Show with James Corden
2015
as Self
The Late Show with Stephen Colbert
2015
as Self - Guest
NCIS: New Orleans
2014
as Leroy Jethro Gibbs
The Arsenio Hall Show
2013
as Self
Steve Harvey
2012
as Self
Certain Prey
2011
as Lucas Davenport
Justice League: Crisis on Two Earths
2010
as Superman (voice)
Weather Girl
2009
as Dale
The Bonnie Hunt Show
2008
as Self
The Megan Mullally Show
2006
as Self - Guest
Chasing Liberty
2004
as James Foster
The Tony Danza Show
2004
as Self
Freaky Friday
2003
as Ryan
Jimmy Kimmel Live!
2003
as Self
NCIS
2003
as Leroy Jethro Gibbs
Local Boys
2002
as Jim Wesley
Intimate Portrait: Pam Dawber
2002
as Self
Crossfire Trail
2001
as Bruce Barkow
And Never Let Her Go
2001
as Thomas Capano
The Amati Girls
2001
as Lawrence
The Legend of Tarzan
2001
as Bob Markham (voice)
And Never Let Her Go
2001
as Thomas Capano
For All Time
2000
as Charles Lattimer
I'll Remember April
1999
as John Cooper
The West Wing
1999
as Simon Donovan
Family Guy
1999
as Leroy Jethro Gibbs (voice)
Fear and Loathing in Las Vegas
1998
as Magazine Reporter
From the Earth to the Moon
1998
as Wally Schirra
Casualties
1997
as Tommy Nance
The First to Go
1997
as Jeremy Hampton
The View
1997
as Self
The Rosie O'Donnell Show
1996
as Self
Strangers
1996
as Mark
Original Sins
1995
as Johnathan Franye
Magic in the Water
1995
as Jack Black
The Last Supper
1995
as Dominant Male
JAG
1995
as Leroy Jethro Gibbs
Charlie Grace
1995
as Charlie Grace
Wyatt Earp
1994
as Sheriff Johnny Behan
Natural Born Killers
1994
as Mickey Knox in TV
Chicago Hope
1994
as Jack McNeil
Harts of the West
1993
Cold Heaven
1992
as Alex Davenport
The Tonight Show with Jay Leno
1992
Shadow of a Doubt
1991
as Charles Spencer
Dillinger
1991
as John Dillinger
Long Road Home
1991
as Ertie Robertson
Till There Was You
1991
as Frank Flynn
Fourth Story
1991
as David Shepard
Reasonable Doubts
1991
as Det. Dicky Cobb
Worth Winning
1989
as Taylor Worth
Sweet Bird of Youth
1989
as Chance Wayne
The Presidio
1988
as Jay Austin
Stealing Home
1988
as Billy Wyatt
Summer School
1987
as Freddy Shoop
Dear America: Letters Home from Vietnam
1987
as (voice)
After the Promise
1987
as Elmer Jackson
The Deliberate Stranger
1986
as Ted Bundy
Prince of Bel Air
1986
as Robin Prince
Let's Get Harry
1986
as Harry
The Deliberate Stranger
1986
as Ted Bundy
Moonlighting
1985
as Sam Crawford
Tuareg: Desert Warrior
1984
as Gacel Sayah
Intimate Agony
1983
as Tommy
St. Elsewhere
1982
as Robert Caldwell
Flamingo Road
1981
as Field Carlyle
Goliath Awaits
1981
as Peter Cabot
Entertainment Tonight
1981
as Self
Flamingo Road
1980
as Fielding Carlyle
The Dream Merchants
1980
as Johnny Edge
Beyond the Poseidon Adventure
1979
as Larry Simpson
240-Robert
1979
as Thib Thibideaux
Getting Married
1978
as Howie Lesser
Comes a Horseman
1978
as Billy Joe Meynert
Little Mo
1978
as Norman Brinker
Centennial
1978
as Captain John McIntosh
Sam
1978
as Mike Breen
Eleanor and Franklin: The White House Years
1977
as Robert Dunlap
The Love Boat
1977
as Doug Bradbury
The Hardy Boys / Nancy Drew Mysteries
1977
Laverne & Shirley
1976
All's Fair
1976
Delvecchio
1976
as Ronnie Striker
Saturday Night Live
1975
as Self - Host
Sonic Boom
1974
as Student Controller
Police Woman
1974
as Stanski
Police Woman
1974
as Paul Donin
Ozzie's Girls
1973
Emergency!
1972
as Ofcr. Dave Gordon
Adam-12
1968
as Officer Gus Corbin
The Tonight Show Starring Johnny Carson
1962
as Self
Hallmark Hall of Fame
1951
as Charles
Golden Globe Awards
1944
as Self - Nominee
Golden Globe Awards
1944
as Self