Ray Milland
Tony Wendice

Grace Kelly
Margot Wendice

Robert Cummings
Mark Halliday

John Williams
Chief Inspector Hubbard

Anthony Dawson
Charles Swann

Patrick Allen
Detective Pearson

Robin Hughes
Police Sergeant O'Brien

Jack Cunningham
Bobby (uncredited)

Guy Doleman
Detective (uncredited)

Bess Flowers
Woman Exiting Ship (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)