Mark Harmon
Known for: Acting
Born: September 2, 1951
Place of birth: 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.
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Filmography
48 movies · 53 TV shows, newest first
6.8
Freakier Friday
2025
7.6
NCIS: Origins
2024
9.0
NCISverse: The First 1,000
2024
8.6
Joe Montana: Cool Under Pressure
2022
6.3
The Kelly Clarkson Show
2019
7.0
The Wild
2019
7.5
All or Nothing: The Michigan Wolverines
2018
6.7
The American West
2016
6.1
The Late Show with Stephen Colbert
2015
5.1
The Late Late Show with James Corden
2015
7.3
NCIS: New Orleans
2014
5.7
The Arsenio Hall Show
2013
7.0
Steve Harvey
2012
4.9
Certain Prey
2011
7.3
Justice League: Crisis on Two Earths
2010
5.6
Weather Girl
2009
4.4
The Bonnie Hunt Show
2008
4.7
The Megan Mullally Show
20066.4
The Tony Danza Show
2004
6.2
Chasing Liberty
2004
7.6
NCIS
2003
6.6
Freaky Friday
2003
5.3
Jimmy Kimmel Live!
2003
6.4
Local Boys
20028.0
Intimate Portrait: Pam Dawber
2002
7.0
The Legend of Tarzan
2001
6.7
And Never Let Her Go
2001
7.0
And Never Let Her Go
2001
6.4
Crossfire Trail
2001
4.7
The Amati Girls
2001
7.7
Boston Public
2000
6.4
For All Time
2000
8.3
The West Wing
1999
6.6
I'll Remember April
1999
7.4
Family Guy
1999
7.2
Fear and Loathing in Las Vegas
1998
8.1
From the Earth to the Moon
1998
4.3
The View
1997
6.8
Casualties
1997
10.0
The First to Go
1997
4.1
The Rosie O'Donnell Show
1996
4.3
Strangers
1996
7.3
JAG
1995
8.0
Charlie Grace
1995
6.5
The Last Supper
1995
5.3
Magic in the Water
1995
4.0
Original Sins
1995
7.2
Chicago Hope
1994
7.1
Natural Born Killers
1994
6.8
Wyatt Earp
1994
6.8
Harts of the West
1993
4.3
Cold Heaven
1992
5.4
The Tonight Show with Jay Leno
1992
7.6
Reasonable Doubts
1991
4.0
Till There Was You
19916.0
Shadow of a Doubt
1991
6.5
Long Road Home
1991
5.4
Fourth Story
1991
5.6
Dillinger
1991
5.3
Worth Winning
1989
5.5
Sweet Bird of Youth
1989
6.3
Stealing Home
1988
5.8
The Presidio
1988
7.5
After the Promise
1987
7.1
Dear America: Letters Home from Vietnam
1987
6.4
Summer School
1987
6.2
Let's Get Harry
1986
6.3
The Deliberate Stranger
1986
7.0
The Deliberate Stranger
1986
5.0
Prince of Bel Air
1986
7.5
Moonlighting
1985
5.3
Tuareg: Desert Warrior
1984
5.0
Intimate Agony
1983
5.7
St. Elsewhere
1982
6.9
Goliath Awaits
1981
4.3
Entertainment Tonight
1981
6.3
Flamingo Road
1981
10.0
Flamingo Road
1980
5.7
The Dream Merchants
1980
7.4
240-Robert
1979
5.0
Beyond the Poseidon Adventure
1979
6.1
Comes a Horseman
1978
7.7
Centennial
1978
7.3
Little Mo
1978
6.0
Getting Married
1978
7.0
Sam
1978
6.3
The Love Boat
19774.9
Eleanor and Franklin: The White House Years
1977
7.1
The Hardy Boys / Nancy Drew Mysteries
1977
7.7
All's Fair
1976
7.0
Delvecchio
1976
7.1
Laverne & Shirley
1976
6.9
Saturday Night Live
1975
6.4
Police Woman
1974
5.6
Sonic Boom
19746.8
Ozzie's Girls
1973
8.0
Emergency!
1972
7.1
Adam-12
1968
7.5
The Tonight Show Starring Johnny Carson
1962
8.8
Hallmark Hall of Fame
1951
7.0
Golden Globe Awards
1944