Scottish actor David McCallum, known for his role as a secret agent in the 1960s spy drama ‘The Man from U.N.C.L.E.’ has passed away at the age of 90.

The actor is said to have peacefully departed this morning due to natural causes at New York Presbyterian Hospital, with family members by his side. The previously scheduled 20th anniversary NCIS marathon will now feature an ‘In Memoriam’ card in his honour.

The Glasgow-born McCallum was the last remaining original cast member on CBS’ ‘NCIS’ portraying the eccentric but efficient Chief Medical Examiner Donald ‘Ducky’ Mallard.

One tribute came in via social media from the NCIS account “We will miss his warmth and endearing sense of humour that lit up any room or soundstage he stepped onto,” 

“David was a gifted actor and author, and beloved by many around the world,” the NCIS tribute said.

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“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.”

Early in his career, in the 1960s, McCallum secured the role of Illya Kuryakin in the television series ‘The Man from U.N.C.L.E.,’ ultimately becoming a co-star alongside Robert Vaughn. Another renowned role came in the cult British supernatural science-fiction series ‘Sapphire and Steel,’ where he shared the screen with Joanna Lumley.

His career extended to the silver screen with memorable performances in films such as ‘The Great Escape,’ ‘A Night to Remember,’ ‘The Greatest Story Ever Told’ and many more.

His notable television credits encompassed shows like ‘Colditz,’ ‘The Invisible Man,’ ‘The Education of Max Bickford,’ ‘Kidnapped,’ ‘The Outer Limits,’ and ‘Sex and the City.’