Mark Harmon Got Valuable Advice From His Dad – And It Had A Huge Influence On The NCIS Star’s Life

Image: Monty Brinton/CBS via USA Today

Actor Mark Harmon is known to most as Leroy Jethro Gibbs from the hugely successful TV show NCIS. But did you know that the actor comes from a very famous family? Mark’s dad, for instance, was none other than former NFL star and broadcaster Tom Harmon. And in February 2019 the star spoke to People magazine about some profound – and slightly profane – advice that his father had imparted to him. Yet while the anecdote may sound like an NCIS scene between Gibbs and Jackson, it’s totally real – and something that Mark has carried with him throughout his whole life.

Image: via Topsimages

It’s fair to say that the Harmon family tree is full of famous faces. At the top, there’s football star Tom and his wife, Elyse Knox, who was an actress. Then, of course, there’s Mark himself – a successful TV star. Elsewhere, Mark’s sister Kristin wed The Adventures of Ozzie & Harriet actor Rick Nelson. And from that union came actress Tracy Nelson and rockers Matthew and Gunnar Nelson.

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