David McCallum, beloved 'NCIS' and 'The Man from U.N.C.L.E.' star, passes away at 90

David McCallum, the actor known for his roles in "The Man from U.N.C.L.E." and "NCIS," has passed away at the age of 90. McCallum became a teen heartthrob in the 1960s with his role as Illya Kuryakin in "The Man from U.N.C.L.E." and later gained popularity as Dr. Donald "Ducky" Mallard in "NCIS." He had a successful career in film and television, and his legacy will be remembered by his family and the countless hours of entertainment he provided to audiences around the world.