David McCallum is a Scottish actor known nowadays for playing Dr. Donald "Ducky" Mallard on NCIS.
McCallum was born in Glasgow, Scotland. He attended the Royal Academy of Dramatic Art and became Assistant Stage Manager of the Glyndebourne Opera Company in 1951.
He began his career as a bit-part actor in British films of the late 1950s and early 1960s. His big break came in the '60s Cold War series The Man from U.N.C.L.E., which turned McCallum into a sex symbol.
McCallum's role as mysterious Russian agent Illya Kuryakin was originally conceived as a peripheral one. However, McCallum took the opportunity to construct a complex, enigmatic character.
David has over 100 TV and film credits to his name since.
He has five children, three with ex-wife Jill Ireland, and two with Katherine Carpenter, to whom he has been married since 1967.
David and Katherine McCallum are active with charitable organizations that support the U.S. Marine Corps.
Katherine's father was a Marine who served in the Battle of Iwo Jima, and her brother lost his life in Vietnam.