Kurt's had a loooong career, including roles in movies like Escape from New York, The Hateful Eight, and — you guessed it — a Marvel movie, Guardians of the Galaxy Vol. 2. Since he was such a big star in the '80s and '90s especially, many people don't realize that he was a child actor back in the '60s first. His first credited role was in the Dennis the Menace TV series when he was 11 years old, but here he is in The Man From U.N.C.L.E. in 1964, at 13: