David Keith McCallum, Jr. (19 September 1933 - 25 September 2023) was a Scottish actor and musician. McCallum was best know for portraying Russian spy Illya Kuryakin on the television series The Man from U.N.C.L.E. (1964-1968) and medical examiner Donald "Ducky" Mallard on the television series "NCIS" (2003-2023). As a musician, McCallum released four albums for Capital Records in the 1960s.
In the 1960s, McCallum recorded four albums for Capitol Records with music producer David Axelrod: Music. .
