• 
  Richard Thorpe

  regizor

• 
  Edward E. Rose

  scenarist

• 
  Deborah Kerr

  Printesa Flavia
• 
  Stewart Granger

  Rudolf Rassendyll / King Rudolf V
• 
  Alphonse Martell

  Nobleman
• 
  Thomas Browne Henry

  Detchard
• 
  Doris Lloyd

  Lady Topham
• 
  George J. Lewis

  Uhlan guard at hunting lodge

• 
  Forbes Murray

  Dignitary
• 
  Peter Brocco

  Johann
• 
  Jane Greer

  Antoinette de Mauban
• 
  James Mason

  Rupert of Hentzau
• 
  Lewis Stone

  The Cardinal
• 
  Jay Adler

  Customs officer
• 
  Kathleen Freeman

  Gertrud Holf

• 
  Charles Watts

  The porter
• 
  Louis Calhern

  Col. Zapt
• 
  Robert Douglas

  Michael, Duke of Strelsau
• 
  Robert Coote

  Fritz von Tarlenheim
• 
  Francis Pierlot

  Josef