Take a closer look at Sean Harmon in our detailed breakdown.

Sean Harmon was born on April 25, 1988, and grew up in Burbank, California, USA. Sean Thomas Harmon was reared by his renowned parents, Mark Harmon and Pam Dawber. Sean’s father has played the adult version of the character, Jethro Gibbs, on television for nearly two decades. Sean’s mother, Pam Dawber, on the other hand, is an actress best known for her appearance in the television comedy Mork and Mindy. Sean is Tom Harmon and Elyse Knox’s grandchild. He was raised with his younger brother, Ty Harmon (Ty Christian Harmon). He enjoys surfing, kickboxing, and other high-energy activities.