Mark Harmon is one of those actors whose character might just be more famous than the actor himself. Harmon got the role of a lifetime as Leroy Jethro Gibbs on NCIS – and it made him one of the most famous faces in the world.
But behind the scenes, Mark Harmon has faced his share of hardships, and his sister’s tragic death in 2018 was a huge blow for the actor and his family.