Is Gary Cole Related to Mark Harmon? The Truth Behind the NCIS Stars

NCIS is one of the most popular and longest-running crime dramas on television, with millions of fans around the world. The show has been on the air since 2003, and has featured many talented actors in its cast. However, two of the most prominent and beloved stars of NCIS are Mark Harmon and Gary Cole, who play Leroy Jethro Gibbs and Alden Parker, respectively.

But are these two actors related in real life? Many fans have wondered if there is a family connection between them, especially since they both have similar features and surnames. In this article, we will explore the truth behind the relationship between Mark Harmon and Gary Cole, and how they became part of NCIS.

Mark Harmon: The Iconic Leader of NCIS

Mark Harmon is best known for his role as Leroy Jethro Gibbs, the former Marine and leader of the NCIS team. Harmon has been playing Gibbs since the first season of NCIS, and has become one of the most recognizable faces of the show. He has also been nominated for several awards for his performance, including four Primetime Emmy Awards.

According to IMDb, Harmon was born on September 2, 1951, in Burbank, California. His father was Tom Harmon, a Heisman Trophy-winning football player and broadcaster, and his mother was Elyse Knox, an actress and model. He has two older sisters, Kristin and Kelly. He is also related to several other famous actors, such as his uncle Jesse Wayne, his cousin Tracy Nelson, and his sister-in-law Pam Dawber.

Harmon attended UCLA, where he played college football as a quarterback. He graduated with a degree in communication in 1974. He then pursued a career in acting, appearing in various TV shows and movies, such as St. Elsewhere, The West Wing, Freaky Friday, and Chicago Hope.

Harmon married Pam Dawber, an actress best known for her role in Mork & Mindy, in 1987. They have two sons together, Sean and Ty.

Gary Cole: The Newcomer to NCIS

Gary Cole is the latest addition to the NCIS cast, joining the show in its 19th season as FBI Special Agent Alden Parker. Cole’s character is introduced as a replacement for Gibbs, who has gone missing after his boat exploded in the season 18 finale. Parker is a seasoned agent who has a different style and approach than Gibbs, but also respects and admires him.

According to IMDb, Cole was born on September 20, 1956, in Park Ridge, Illinois. His father was Robert Cole, a school administrator, and his mother was Margaret Cole, a director of finance. He has one older brother, Jeffrey. He attended Illinois State University, where he studied theater and met his future wife, Teddi Siddall.

Cole started his acting career in theater, performing with the Steppenwolf Theatre Company in Chicago. He then moved to Los Angeles, where he appeared in various TV shows and movies, such as The Brady Bunch Movie, Office Space, Veep, The Good Wife, and Talladega Nights: The Ballad of Ricky Bobby.

Cole married Teddi Siddall, an actress and writer, in 1992. They have one daughter together, Mary. They separated in 2015 and divorced in 2017.

The answer is no. Mark Harmon and Gary Cole are not related by blood or marriage. They are simply two actors who happen to share a common surname and work on the same show. However, they do have some things in common besides their profession.

For instance, both Harmon and Cole are avid golfers who enjoy playing the sport in their spare time. They are also both animal lovers who have adopted dogs from shelters. Additionally, they both have experience working with Pam Dawber, who is Harmon’s wife and Cole’s co-star in Life…and Stuff.

However, despite their similarities and their collaboration on NCIS, Harmon and Cole do not seem to have a close personal relationship off-screen. They have not been seen hanging out together or attending events as friends. They are more likely to be colleagues who respect each other’s work and get along well on set.


Mark Harmon and Gary Cole are two talented actors who have made their mark on NCIS as Gibbs and Parker. However, they are not related in any way other than sharing a last name and a passion for acting. They have different backgrounds, families, and careers that make them unique individuals. They may not be brothers by blood or by law but they are brothers by bond through their roles on NCIS.

Doms Desk

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