Modern audiences will recognize McCallum as Donald “Ducky” Mallard on"NCIS.

“The actor is survived by his wife,model Katherine Carpenter, whom McCallum married in 1967.

McCallum had three children with Ireland; Paul, Val, and Jason, who sadly died in 1989.

NCIS star David McCallum smiling

The “NCIS” stalwart is also survived by his two children with Carpenter, Sophie and Peter.

David was a gifted actor and author, and beloved by many around the world.

McCallum joined “The Man From U.N.C.L.E.”

Robert Vaughn and David McCallum on The Man From U.N.C.L.E.

McCallum played Illya Kuryakin, a Russian sidekick to Robert Vaughn’s super agent, Napoleon Solo.

The Fifteen Years Later Affair.”

McCallum will be sorely missed by friends, family, and fans.