- Unknown:
- Stewart Granger
- Unknown:
- Deborah Kerr
- Unknown:
- James Mason
- Unknown:
- Louis Calhern
- Unknown:
- Jane Greer
- Unknown:
- Lewis Stone
- Unknown:
- Robert Douglas
- Unknown:
- Stewart Granger
- Played By:
- James Mason
- Unknown:
- Deborah Kerr
- Unknown:
- John L. Balderston
- Unknown:
- Noel Langley
- Produced By:
- Pandro S. Berman
- Directed By:
- Richard Thorpe
- Rudolf Rassendyll/King Rudolf V:
- Stewart Granger
- Princess Flavia:
- Deborah Kerr
- Rupert of Hentzau:
- James Mason
- Col Zapt:
- Louis Calhern
- Antoinette de Mauban:
- Jane Greer
- The cardinal:
- Lewis Stone
- Michael, Duke of Strelsau:
- Robert Douglas
- Fritz von Tarlenheim:
- Robert Coote
- Johann:
- Peter Brocco
- Josef:
- Frances Pierlot