| Gregory Peck | Joe Bradley |
| Audrey Hepburn | Princess Ann |
| Eddie Albert | Irving Radovich |
| Hartley Power | Mr. Hennessy |
| Harcourt Williams | Ambassador |
| Margaret Rawlings | Countess Vereberg |
| Tullio Carminati | Gen. Provno |
| Paolo Carlini | Mario Delani |
| Claudio Ermelli | Giovanni |
| Paola Borboni | Charwoman |
| Director | William Wyler |
| Producer | Robert Wyler; William Wyler |
| Writer | Dalton Trumbo; Ian McLellan Hunter |
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