During the course of an enviable career, Mark Harmon’s acting talent has earned him multiple Emmy and Golden Globe nominations. But it is his portrayal of Special Agent ‘Leroy Jethro Gibbs’ on "NCIS" for which he is most recognized. The CBS drama continues to rank in the #1 spot among scripted shows. It’s no surprise that Harmon and the series have been nominated for numerous People’s Choice Awards. He won for Favorite Crime Drama TV Actor during "NCIS’" 14th season, further demonstrating the enduring popularity of the show.

Going into the 9th season, Harmon was elevated to Executive Producer on the show and to kick off the 10th season, Harmon was honored with a star on the Hollywood Walk of Fame. In the 11th season of "NCIS," he worked closely with showrunner Gary Glasberg on a special two episode arc that reunited Gibbs with an old comrade working a case in New Orleans. These episodes became the pilot for "NCIS: NOLA," with Harmon serving as Executive Producer on the spinoff.

While on hiatus from "NCIS" he also developed, executive produced and starred in "Certain Prey," an original movie for USA Network. Based on the series of Prey books written by John Sandford, Harmon portrayed Minneapolis Deputy Police Chief ‘Lucas Davenport.’

In other television work, he was nominated for an Emmy for Outstanding Guest Actor in a Drama Series for NBC’s much-lauded "The West Wing." Previously he earned an Emmy nomination for Outstanding Supporting Actor in a Drama Special for "Eleanor and Franklin: The White House Years." He received two consecutive Golden Globe nominations for his work on "Reasonable Doubts," and received two additional Golden Globe nominations for Best Performance by an Actor in a Motion Picture Made for TV; one for "After the Promise," and another for his role as notorious serial killer Ted Bundy in "The Deliberate Stranger." Along with his costars on "Chicago Hope," he received two Best Ensemble SAG Award nominations. While on the hit show, Harmon also directed several episodes of the program. Other notable television performances include portraying astronaut Wally Schirra in HBO’s "From Earth to the Moon" produced by Tom Hanks, "St. Elsewhere," "Moonlighting," and Tennessee Williams’ "Sweet Bird of Youth."

On the big screen, Harmon played the co-host of a local morning news show in the indie film "Weather Girl," the President of the United States in Warner Brothers’ film "Chasing Liberty" with Mandy Moore, and opposite Jamie Lee Curtis in the Disney hit remake of "Freaky Friday." He made his feature film debut in Alan Pakula’s "Comes a Horseman." Additional credits include Lawrence Kasdan’s "Wyatt Earp," "Stealing Home" with Jodie Foster, "The Presidio," and Carl Reiner’s smash hit, "Summer School." Harmon also made memorable cameo appearances in "Fear and Loathing in Las Vegas," "Natural Born Killers," and "The Last Supper." He lent his voice to the character of ‘Superman’ in Warner Home Video’s release "Justice League: Crisis on Two Earths" as well.

On stage, Harmon has appeared in Kevin Wade’s "Key Exchange," Bill C. Davis’ "Wrestlers," and Mark Medoff’s "The Wager." In addition, he has done several successful productions of A.R. Gurney’s hit play "Love Letters" with his wife, actress Pam Dawber.

Born and raised in Southern California, Harmon excelled in sports. He quarterbacked UCLA to multiple winning football seasons and was awarded the National Collegiate Football Foundation Award for All Around Excellence. He is a Cum Laude graduate, with a degree in Communications. His father, Tom Harmon, was a Heisman Trophy winner and nationally acclaimed broadcaster, and his mother was former actress Elyse Knox.