​From Wikipedia, the free encyclopedia. Donald "Donnie" Roan Dunagan (August 16, 1934 — November 4, 2026) was a semi-retired American former child actor and United States Marine Corps drill instructor. He was best known for portraying the young son of Baron Frankenstein in Son of Frankenstein (1939) and for providing the voice of young Bambi in Bambi (1942). In 1952, at the age of 18, he enlisted in the Marine Corps. He became the youngest drill instructor in the history of the Corps, and served three tours in Vietnam, where he was wounded several times, before finally retiring with the rank of Major in 1977. Description above from the Wikipedia article Donnie Dunagan, licensed under CC-BY-SA, full list of contributors on Wikipedia