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 ...
Known for: Family Guy, Fear and Loathing in Las Vegas, Freaky Friday, Natural Born Killers, NCIS
Explore Mark Harmon's full filmography, follow for new releases, and add their work to your watchlist on Flick Me.