 Ray MillandTony Wendice | Tony Wendice |
 Grace KellyMargot Wendice | Margot Wendice |
 Robert CummingsMark Halliday | Mark Halliday |
 John WilliamsChief Inspector Hubbard | Chief Inspector Hubbard |
 Anthony DawsonCharles Swann | Charles Swann |
| LLeo BrittStoryteller | Storyteller |
 Patrick AllenDetective Pearson | Detective Pearson |
| GGeorge LeighDetective Williams | Detective Williams |
| GGeorge AldersonFirst Detective | First Detective |
 Robin HughesPolice Sergeant O'Brien | Police Sergeant O'Brien |
 Jack CunninghamBobby (uncredited) | Bobby (uncredited) |
 Guy DolemanDetective (uncredited) | Detective (uncredited) |
 Bess FlowersWoman Exiting Ship (uncredited) | Woman Exiting Ship (uncredited) |
| SSam HarrisMan in Phone Booth (uncredited) | Man in Phone Booth (uncredited) |
 Harold MillerMen's Club Party Member (uncredited) | Men's Club Party Member (uncredited) |
 Martin MilnerPoliceman Outside Wendice Flat (uncredited) | Policeman Outside Wendice Flat (uncredited) |
 Forbes MurrayJudge at Margot's Trial (uncredited) | Judge at Margot's Trial (uncredited) |
 Thayer RobertsDetective (uncredited) | Detective (uncredited) |
 William H. O'BrienWaiter at Stag Dinner (uncredited) | Waiter at Stag Dinner (uncredited) |
 Alfred HitchcockBanquet Member (uncredited) | Banquet Member (uncredited) |
| HHerschel GrahamBanquet Member (uncredited) | Banquet Member (uncredited) |
| RRobert DobsonPolice Photographer (uncredited) | Police Photographer (uncredited) |
