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Mark Harmon's Age Revealed: 7 Things You Didn't Know About The 74-Year-Old NCIS Legend

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Mark Harmon, the iconic actor best known for his 18-season run as Special Agent Leroy Jethro Gibbs on the global phenomenon *NCIS*, remains one of Hollywood’s most enduring and private stars. As of today, December 23, 2025, fans are constantly searching for updates on his life, career, and, most frequently, his current age.

The legendary actor, producer, and former college football star is currently 74 years old. Born Thomas Mark Harmon on September 2, 1951, he celebrated his 74th birthday a few months ago, and despite stepping back from his full-time acting duties on *NCIS*, he is far from retired, having recently taken on a new, high-profile role within the franchise that first made him a household name.

Mark Harmon: A Complete Biographical Profile

Thomas Mark Harmon is a multifaceted American talent with a career spanning over five decades in television, film, and stage. His biography is a fascinating blend of Hollywood royalty, athletic prowess, and an unwavering commitment to privacy, making his personal life a constant source of public curiosity.

  • Full Name: Thomas Mark Harmon
  • Current Age: 74 years old (as of December 23, 2025)
  • Date of Birth: September 2, 1951
  • Birthplace: Burbank, California, U.S.
  • Parents: Tom Harmon (Heisman Trophy winner, sportscaster) and Elyse Knox (actress, fashion designer)
  • Spouse: Pam Dawber (actress, married 1987)
  • Children: Sean Harmon and Ty Harmon (two sons)
  • Education: University of California, Los Angeles (UCLA) – B.A. in Communications
  • Notable Roles: Leroy Jethro Gibbs (*NCIS*), Dr. Robert Caldwell (*St. Elsewhere*), Dr. Jack McNeil (*Chicago Hope*), Field Agent Simon Donovan (*The West Wing*)
  • Career Status: Semi-retired from full-time acting, active as an executive producer and narrator.

The Gibbs Legacy: Harmon’s Surprising NCIS Involvement in 2025

While Mark Harmon officially exited his full-time role as Special Agent Gibbs in the fourth episode of *NCIS* Season 19 in 2021, his connection to the franchise is stronger than ever in 2025. This continued involvement is a key reason why his name and age remain top search queries, proving the enduring popularity of his character, Leroy Jethro Gibbs.

Executive Producer and Narrator of NCIS: Origins

The most significant and fresh update to Harmon’s career is his central role in the new prequel series, *NCIS: Origins*. This series, which premiered in 2025, is set in 1991 and explores the early career of a young Leroy Jethro Gibbs as a new agent at the NCIS Camp Pendleton office. Harmon’s involvement is crucial, as he serves not only as an Executive Producer but also as the Narrator of the show. His voice guides the audience through the formative years of the character he played for nearly two decades, adding topical authority and a direct link to the original series.

In a rare and much-celebrated moment for fans, Harmon even reprised the role of Gibbs for a brief, rare cameo appearance during a crossover event with the flagship *NCIS* series. This small return, even as a cameo, proves that the door is always open for the legendary agent to reappear, keeping the hope of a full return alive for millions of viewers worldwide.

Beyond NCIS: New Projects, Net Worth, and Private Life Updates

Mark Harmon’s career trajectory is unique. Unlike many stars who seek the spotlight, Harmon has always prioritized his family and privacy, a philosophy that has only deepened in his mid-70s. However, recent reports suggest his semi-retirement is not entirely fulfilling, hinting at a potential return to more active acting roles.

The $120 Million Net Worth in 2025

One of the most astonishing facts about Mark Harmon is his financial success, largely thanks to his tenure on *NCIS*. As of 2025, Mark Harmon's estimated net worth is a staggering $120 million. This impressive figure comes not just from his acting salary—which peaked at an estimated $525,000 per episode—but also from his lucrative role as a producer on the show, which earned him a percentage of the series’ profits. His financial standing solidifies his position as one of the wealthiest actors in television history.

The Secret to a 38-Year Marriage: Pam Dawber

In a town famous for short-lived relationships, Mark Harmon’s marriage to actress Pam Dawber, star of *Mork & Mindy*, is a testament to longevity. The couple married in an intimate ceremony in 1987 and are still happily married nearly four decades later. Dawber, who is 74 years old, famously joined her husband on *NCIS* for a few episodes as journalist Marcie Warren, marking a rare on-screen collaboration. Their secret, according to both, is their intense commitment to keeping their private lives out of the public eye, a strategy that has successfully protected their family from the pressures of fame.

A Surprising Return to Film in 2025

In a move that excited both his long-time fans and Disney enthusiasts, Mark Harmon is set to reprise his role as Ryan in the highly anticipated 2025 reboot of the classic film *Freaky Friday*. This unexpected return to the big screen shows that while he may have left the daily grind of a network series, the 74-year-old actor is still eager to take on interesting and high-profile projects that resonate with him.

Mark Harmon’s Enduring Appeal and Topical Authority

Mark Harmon’s life story—from a college football quarterback at UCLA to a television icon—is a study in sustained success. His early career included an array of roles, notably as Dr. Robert Caldwell in *St. Elsewhere* and a memorable turn as the charming, but ultimately tragic, Field Agent Simon Donovan in *The West Wing*. These roles established his reputation as a reliable, charismatic leading man long before he picked up Gibbs’ signature boat-building tools.

His decision to transition from full-time acting to executive producing and narrating *NCIS: Origins* is a calculated move that maintains his topical authority within the world of crime drama. It ensures that even at 74 years old, Thomas Mark Harmon remains a powerful force in Hollywood, shaping the future of the franchise he helped build. For fans, his age is simply a number; his legacy as Agent Gibbs and his continued creative influence are what truly define him in 2025.

how old is mark harmon
how old is mark harmon

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