Mark Harmon
Acting
1951-09-02 · 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.
Filmography
Freakier Friday
2025 · Movie
NCIS: Origins
2024 · Series
NCISverse: The First 1,000
2024 · Movie
Joe Montana: Cool Under Pressure
2022 · Series
The Kelly Clarkson Show
2019 · Series
The Wild
2019 · Movie
All or Nothing: The Michigan Wolverines
2018 · Series
The American West
2016 · Series
The Late Show with Stephen Colbert
2015 · Series
The Late Late Show with James Corden
2015 · Series
NCIS: New Orleans
2014 · Series
The Arsenio Hall Show
2013 · Series
Steve Harvey
2012 · Series
Certain Prey
2011 · Movie
Justice League: Crisis on Two Earths
2010 · Movie
Weather Girl
2009 · Movie
The Bonnie Hunt Show
2008 · Series
The Megan Mullally Show
2006 · Series
The Tony Danza Show
2004 · Series
Chasing Liberty
2004 · Movie
NCIS
2003 · Series
Freaky Friday
2003 · Movie
Jimmy Kimmel Live!
2003 · Series
Local Boys
2002 · Movie
Intimate Portrait: Pam Dawber
2002 · Movie
The Legend of Tarzan
2001 · Series
And Never Let Her Go
2001 · Series
And Never Let Her Go
2001 · Movie
Crossfire Trail
2001 · Movie
The Amati Girls
2001 · Movie
Boston Public
2000 · Series
For All Time
2000 · Movie
The West Wing
1999 · Series
I'll Remember April
1999 · Movie
Family Guy
1999 · Series
Fear and Loathing in Las Vegas
1998 · Movie
From the Earth to the Moon
1998 · Series
The View
1997 · Series
Casualties
1997 · Movie
The First to Go
1997 · Movie
The Rosie O'Donnell Show
1996 · Series
Strangers
1996 · Series
JAG
1995 · Series
Charlie Grace
1995 · Series
The Last Supper
1995 · Movie
Magic in the Water
1995 · Movie
Original Sins
1995 · Movie
Chicago Hope
1994 · Series
Natural Born Killers
1994 · Movie
Wyatt Earp
1994 · Movie
Harts of the West
1993 · Series
Cold Heaven
1992 · Movie
The Tonight Show with Jay Leno
1992 · Series
Reasonable Doubts
1991 · Series
Till There Was You
1991 · Movie
Shadow of a Doubt
1991 · Movie
Long Road Home
1991 · Movie
Fourth Story
1991 · Movie
Dillinger
1991 · Movie
Worth Winning
1989 · Movie
Sweet Bird of Youth
1989 · Movie
Stealing Home
1988 · Movie
The Presidio
1988 · Movie
After the Promise
1987 · Movie
Dear America: Letters Home from Vietnam
1987 · Movie
Summer School
1987 · Movie
Let's Get Harry
1986 · Movie
The Deliberate Stranger
1986 · Series
The Deliberate Stranger
1986 · Movie
Prince of Bel Air
1986 · Movie
Moonlighting
1985 · Series
Tuareg: Desert Warrior
1984 · Movie
Intimate Agony
1983 · Movie
St. Elsewhere
1982 · Series
Goliath Awaits
1981 · Series
Entertainment Tonight
1981 · Series
Flamingo Road
1981 · Series
The Dream Merchants
1980 · Series
Flamingo Road
1980 · Movie
240-Robert
1979 · Series
Beyond the Poseidon Adventure
1979 · Movie
Comes a Horseman
1978 · Movie
Centennial
1978 · Series
Little Mo
1978 · Movie
Getting Married
1978 · Movie
Sam
1978 · Series
The Love Boat
1977 · Series
Eleanor and Franklin: The White House Years
1977 · Movie
The Hardy Boys / Nancy Drew Mysteries
1977 · Series
All's Fair
1976 · Series
Delvecchio
1976 · Series
Laverne & Shirley
1976 · Series
Saturday Night Live
1975 · Series
Police Woman
1974 · Series
Sonic Boom
1974 · Movie
Ozzie's Girls
1973 · Series
Emergency!
1972 · Series
Adam-12
1968 · Series
The Tonight Show Starring Johnny Carson
1962 · Series
Hallmark Hall of Fame
1951 · Series
Golden Globe Awards
1944 · Series