 Loretta YoungSister Margaret | Sister Margaret |
 Celeste HolmSister Scholastica | Sister Scholastica |
 Hugh MarloweRobert Masen | Robert Masen |
 Elsa LanchesterAmelia Potts | Amelia Potts |
 Thomas GomezLuigi Rossi | Luigi Rossi |
 Dorothy PatrickKitty | Kitty |
 Basil RuysdaelThe Bishop | The Bishop |
 Dooley WilsonAnthony James | Anthony James |
 Regis ToomeyMonsignor Talbot | Monsignor Talbot |
 Mike MazurkiSam | Sam |
 Walter BaldwinClaude Jarman (uncredited) | Claude Jarman (uncredited) |
| PPati BehrsNun (uncredited) | Nun (uncredited) |
 John BleiferRosey (uncredited) | Rosey (uncredited) |
 Nan BoardmanNun (uncredited) | Nun (uncredited) |
 Wally BrownHoward Sheldon (uncredited) | Howard Sheldon (uncredited) |
| RRuss ClarkPoliceman (uncredited) | Policeman (uncredited) |
| LLouise ColombetNun (uncredited) | Nun (uncredited) |
| TTeddy DriverCherub (uncredited) | Cherub (uncredited) |
 Robert FoulkNew York City Policeman (uncredited) | New York City Policeman (uncredited) |
| GGordon GebertWillie Matthews (uncredited) | Willie Matthews (uncredited) |
 Eula GuyMrs. O'Connor (uncredited) | Mrs. O'Connor (uncredited) |
 Louis Jean HeydtAl Newman (uncredited) | Al Newman (uncredited) |
| TTim HuntleyBuzz Townsend-Cooper (uncredited) | Buzz Townsend-Cooper (uncredited) |
| DDanny JacksonGeorge (Jarman's Assistant) (uncredited) | George (Jarman's Assistant) (uncredited) |
| VVirginia KeileyMrs. Townsend-Cooper (uncredited) | Mrs. Townsend-Cooper (uncredited) |
 Nolan LearyBethlehem Station Master (uncredited) | Bethlehem Station Master (uncredited) |
 Henri LetondalFather Barraud (uncredited) | Father Barraud (uncredited) |
 Ian MacDonaldMr. Matthews (uncredited) | Mr. Matthews (uncredited) |
 Marion MartinRossi's Manicurist (uncredited) | Rossi's Manicurist (uncredited) |
 Edwin MaxWhitey (uncredited) | Whitey (uncredited) |
