Mark Harmon is expressing his condolences for his longtime NCIS co-star David McCallum, who passed away at the age of 90 on Monday.

Harmon shared a heartfelt statement, saying, “David lived a great, full, long life. I was in awe when I first met him, and all of us on the show were honored to have toed a mark opposite him. My condolences go out to Katherine and his family.”

As previously reported, McCallum, who last appeared remotely in the final two episodes of NCIS Season 20, passed away at New York Presbyterian Hospital of natural causes. With Harmon’s departure from NCIS in Season 19, McCallum was the last original cast member of the CBS procedural.

NCIS’ current executive producers, Steven D. Binder and David North, also paid tribute to McCallum, stating, “For over 20 years, David McCallum endeared himself to audiences around the world playing the wise, quirky, and sometimes enigmatic Dr. Donald ‘Ducky’ Mallard. But as much as his fans may have loved him, those who worked side by side with David loved him that much more. He was a scholar and a gentleman, always gracious, a consummate professional, and never one to pass up a joke. From day one, it was an honor to work with him, and he never let us down. He was, quite simply, a legend. He was also family and will be deeply missed.”

A CBS spokesperson added, “We are deeply saddened by the passing of David McCallum and privileged that CBS was his home for so many years. David was a gifted actor and author, and beloved by many around the world. He led an incredible life, and his legacy will forever live on through his family and the countless hours on film and television that will never go away. We will miss his warmth and endearing sense of humor that lit up any room or soundstage he stepped onto, as well as the brilliant stories he often shared from a life well-lived.”

By chrysos