Acting
Mark Harmon
- Known for
- Acting
- Born
- Sep 2, 1951
- Place of birth
- Burbank, California, USA
- Also known as
- Thomas Mark Harmon
Mark Harmon (born September 2, 1951, in Burbank, California) is an American actor, producer and director. The son of football star Tom Harmon and actress Elyse Knox, he played college football at UCLA before turning to acting in the mid-1970s. He became known for St. Elsewhere and Chicago Hope and starred as Leroy Jethro Gibbs on NCIS from 2003 to 2021, a character introduced on JAG, also serving as a producer of the series. He received an Emmy nomination for his recurring role as Secret Service agent Simon Donovan on The West Wing, and his film work includes Summer School, The Presidio, Wyatt Earp and Freaky Friday.Read more
Acting credits
The Kelly Clarkson Show
Self
Family Guy
Leroy Jethro Gibbs (voice)
The Tonight Show Starring Johnny Carson
Self
NCIS
Leroy Jethro Gibbs
The Late Show with Stephen Colbert
Self - Guest
Saturday Night Live
Self - Host
The View
Self
The Late Late Show with James Corden
Self
Jimmy Kimmel Live!
Self
The West Wing
Simon Donovan
JAG
Leroy Jethro Gibbs
The Tonight Show with Jay Leno
The Love Boat
Doug Bradbury
Chicago Hope
Jack McNeil
Golden Globe Awards
Self - Nominee / Self
Adam-12
Officer Gus Corbin
NCIS: New Orleans
Leroy Jethro Gibbs
St. Elsewhere
Robert Caldwell
Emergency!
Ofcr. Dave Gordon
Laverne & Shirley
Victor
The Tony Danza Show
Self
Moonlighting
Sam Crawford
The Bonnie Hunt Show
Self
Police Woman
Stanski / Paul Donin
NCIS: Origins
Older Leroy Jethro Gibbs (voice) (uncredited) / Older Leroy Jethro Gibbs
The Megan Mullally Show
Self - Guest
The Legend of Tarzan
Bob Markham (voice)
Entertainment Tonight
Self
Steve Harvey
Self
The Hardy Boys / Nancy Drew Mysteries
The Arsenio Hall Show
Self
From the Earth to the Moon
Wally Schirra
The Rosie O'Donnell Show
Self
Reasonable Doubts
Det. Dicky Cobb
Centennial
Captain John McIntosh
Flamingo Road
Field Carlyle
Delvecchio
Ronnie Striker
240-Robert
Thib Thibideaux
Charlie Grace
Charlie Grace
Hallmark Hall of Fame
Charles
Harts of the West
All's Fair
All or Nothing: The Michigan Wolverines
Narrator (voice)
Stand Up to Cancer
Self
The American West
Self
Strangers
Mark
The Dream Merchants
Johnny Edge
Goliath Awaits
Peter Cabot
Joe Montana: Cool Under Pressure
Self - Narrator (voice)
The Deliberate Stranger
Ted Bundy
Ozzie's Girls
And Never Let Her Go
Thomas Capano
Sam
Mike Breen