Mark Harmon
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.
99 acting credits · 2 directing credits
Acting · 99
NCIS
2003
Family Guy
1999
The Tonight Show Starring Johnny Carson
1962
The Late Show with Stephen Colbert
2015
The Kelly Clarkson Show
2019
JAG
1995
Saturday Night Live
1975
The West Wing
1999
The Love Boat
1977
Golden Globe Awards
1944
The Late Late Show with James Corden
2015
The View
1997
Adam-12
1968
Jimmy Kimmel Live!
2003
Chicago Hope
1994
St. Elsewhere
1982
NCIS: New Orleans
2014
Emergency!
1972
Moonlighting
1985
Police Woman
1974
The Tonight Show with Jay Leno
1992
Freakier Friday
2025
From the Earth to the Moon
1998
Laverne & Shirley
1976
The Tony Danza Show
2004
The Hardy Boys / Nancy Drew Mysteries
1977
NCIS: Origins
2024
The Legend of Tarzan
2001
The Bonnie Hunt Show
2008
The Megan Mullally Show
2006
Entertainment Tonight
1981
Flamingo Road
1981
Centennial
1978
Reasonable Doubts
1991
Freaky Friday
2003
The Arsenio Hall Show
2013
Natural Born Killers
1994
Charlie Grace
1995
Fear and Loathing in Las Vegas
1998
The Rosie O'Donnell Show
1996
Harts of the West
1993
Wyatt Earp
1994
240-Robert
1979
Delvecchio
1976
The American West
2016
Hallmark Hall of Fame
1951
Goliath Awaits
1981
Justice League: Crisis on Two Earths
2010
The Presidio
1988
All's Fair
1976
Summer School
1987
Chasing Liberty
2004
The Dream Merchants
1980
Joe Montana: Cool Under Pressure
2022
Beyond the Poseidon Adventure
1979
Dear America: Letters Home from Vietnam
1987
The Last Supper
1995
Strangers
1996
After the Promise
1987
And Never Let Her Go
2001
Crossfire Trail
2001
Comes a Horseman
1978
Sam
1978
The Deliberate Stranger
1986
Tuareg: Desert Warrior
1984
Ozzie's Girls
1973
Eleanor and Franklin: The White House Years
1977
I'll Remember April
1999
NCISverse: The First 1,000
2024
Let's Get Harry
1986
The Deliberate Stranger
1986
Weather Girl
2009
Casualties
1997
Dillinger
1991
Stealing Home
1988
All or Nothing: The Michigan Wolverines
2018
For All Time
2000
Certain Prey
2011
Little Mo
1978
Prince of Bel Air
1986
Sonic Boom
1974
And Never Let Her Go
2001
Local Boys
2002
Sweet Bird of Youth
1989
Shadow of a Doubt
1991
Cold Heaven
1992
Intimate Agony
1983
Flamingo Road
1980
Fourth Story
1991
Original Sins
1995
Worth Winning
1989
Magic in the Water
1995
Long Road Home
1991
The Amati Girls
2001
The Wild
2019
Till There Was You
1991
The First to Go
1997
Getting Married
1978
Intimate Portrait: Pam Dawber
2002
