 | Van Johnson als Pied Piper / Truson |
 | Claude Rains als Mayor of Hamelin |
 | Lori Nelson als Mara |
 | Jim Backus als King's Emissary |
 | Kay Starr als John's Mother |
 | Joseph Sargent |
 | Doodles Weaver als First Counselor (uncredited) |
 | Stanley Adams als Second Counselor (uncredited) |
 | Oliver Blake als Leading Citizen (uncredited) |
| Rene Kroper als Paul (uncredited) |
 | William H. O'Brien als Townsman (uncredited) |
 | Carl Benton Reid als Mayor of Hamelout (uncredited) |
 | Amzie Strickland als Leading Townswoman (uncredited) |
| Judith Woodbury als Townswoman (uncredited) |
 | Cyril Delevanti |
| James Gonzalez als Citizen |
| Jess Kirkpatrick |
| Bretaigne Windust | Director |
| William E. Snyder | Director of Photography |
| Irving Taylor | Writer |
| Hal Stanley | Writer |
| Robert Browning | Writer |
| Hal Stanley | Producer |
| William E. Snyder | Cinematography |
| Norman A. Cerf | Editor |
| Floyd Knudtson | Editor |
| Arthur Lonergan | Production Design |
| G.W. Berntsen | Set Decoration |
| Monty M. Berman | Costume Design |
| Walter Elliott | Sound |
| Edvard Grieg | Music |
