Mark Harmon – 69

Mark Harmon is best known for his portrayal of the fictional character of Leroy Jethro Gibbs, a former U.S. Marine Corps Scout Sniper turned special agent in the television series NCIS. Since the early 1970s, the actor has appeared in various film and television roles, including Emergency!, Ozzie’s Girls, Police Woman, All’s Fair, Comes a Horseman, and Let’s Get Harry, to mention a few. His performance in the medical drama series St. Elsewhere led to his credit as the “Sexiest Man Alive” in 1986 by People magazine.

Following the majority of the 1990s, where he played as a character actor, Harmon starred in the political drama series The West Wing, where he portrayed the fictional character of Secret Service Special Agent Simon Donovan, winning an Emmy Award nomination in 2002 for his performance. Since then, Harmon has starred in numerous television series and films. Currently, at 69, he still plays the character of SSA Leroy Jethro Gibbs and the executive producer of NCIS: New Orleans.