Ferdinand Waldo Demara Jr. (December 1921[1] – June 7, 1982) was an American impostor. He was the subject of both a book and a movie, loosely based on his exploits: The Great Impostor, in which he was played by Tony Curtis. Demara's impersonations included a civil engineer, a sheriff's deputy, an assistant prison warden, a doctor of applied psychology, a hospital orderly, a lawyer, a child-care ex