Fictionalized account of Ferdinand Waldo Demara Jr., who stole or created fictional identities and worked in a variety of occupations, most quite successfully.
- Original title: The Great Impostor
- Release date: March 1, 1961
- Status: Released
- Genres: Comedy
- Runtime: 1h 53min
- Producers: Universal International Pictures
Ferdinand Waldo Demara Jr. / Martin Donner / Dr. Gilbert / Ben. W. Stone / Dr. Joseph Mornay / Robert Boyd Hammnd