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)