For years, NCIS fans have admired Mark Harmon’s portrayal of Leroy Jethro Gibbs, but behind the scenes, the actor has been quietly fighting a personal battle that only a few close friends knew about. In a recent interview, sources close to Harmon revealed that the actor has been dealing with significant health challenges that he chose to keep private for as long as possible.

Harmon, known for his dedication to his craft, had been quietly managing a chronic condition that affected both his physical and mental well-being. “He didn’t want the fans to see him as anything but the strong, capable Gibbs they loved,” a close friend shared. “Mark’s always put others before himself, and that includes his audience.”

Despite the struggle, Harmon continued working on NCIS for years, pushing through his discomfort to deliver unforgettable performances. The toll it took, however, eventually led to his decision to step back from the show in 2021. Those who have worked with him describe him as a true professional who never wanted to let his personal battles interfere with the job.

Fans are now rallying behind the beloved actor, sending messages of support and appreciation for all he has done, not just for NCIS, but for his dedication to his health and family. Mark Harmon’s strength behind the scenes is now being recognized as another reason why his portrayal of Gibbs resonated so deeply with viewers.