- Robert Donat as Hannay
- Madeleine Carroll as Pamela
- John Laurie as Crofter
- Peggy Ashcroft as Crofter's Wife
- Lucie Mannheim as Annabelle
Madeleine Carroll's welts on her wrists were real, from having been handcuffed to costar Donat for hours on end.
The apartment scene at the beginning was later spoofed by Mel Brooks and Madeline Kahn in High Anxiety.