Gary Lee Imhoff (born August 27, 1952) is an American actor. He was a teacher at Milton Katselas' Beverly Hills Playhouse. Imhoff teaches The Professional Artists Workshop and The Musical Artists Workshop at the Scientology Celebrity Center in Los Angeles. Imhoff is probably best known for his Scientology workshops and providing the voice of Prince Cornelius in the Don Bluth film Thumbelina and Harry Osborn in the 1994 Spider-Man animated TV series.