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)