Ray Milland Tony Wendice

Grace Kelly Margot Wendice

Robert Cummings Mark Halliday

John Williams Chief Inspector Hubbard

Anthony Dawson Charles Swann

Leo Britt Storyteller

Patrick Allen Detective Pearson

George Leigh Detective Williams

George Alderson First Detective

Robin Hughes Police Sergeant O'Brien

Jack Cunningham Bobby (uncredited)

Guy Doleman Detective (uncredited)

Bess Flowers Woman Exiting Ship (uncredited)

Sam Harris Man in Phone Booth (uncredited)

Harold Miller Men's Club Party Member (uncredited)

Martin Milner Policeman Outside Wendice Flat (uncredited)

Forbes Murray Judge at Margot's Trial (uncredited)

Thayer Roberts Detective (uncredited)

William H. O'Brien Waiter at Stag Dinner (uncredited)

Alfred Hitchcock Banquet Member (uncredited)

Herschel Graham Banquet Member (uncredited)

Robert Dobson Police Photographer (uncredited)