Cary Grant as John Robie

Grace Kelly as Frances Stevens

Jessie Royce Landis as Jessie Stevens

John Williams as H. H. Hughson

Charles Vanel as Bertani

Brigitte Auber as Danielle Foussard

Jean Martinelli as Foussard

Georgette Anys as Germaine

René Blancard as Commissaire Lepic (uncredited)

William 'Wee Willie' Davis as Big Man in Kitchen (uncredited)

Bess Flowers as Masquerade Party Guest (uncredited)

Bernard Sell as Casino Patron (uncredited)

Charles Sherlock as Detective (uncredited)

Philip Van Zandt as Jewelry Clerk (uncredited)

Alfred Hitchcock as Man Sitting Next to John Robie on Bus (uncredited)

Roland Lesaffre as Bertani Employee (uncredited)

George Boyce as Party Guest (uncredited)

John Alderson as Detective at the Costume Ball (uncredited)

Alberto Morin as Detective (uncredited)

Manuel París as Croupier (uncredited)

Gladys Holland as Elegant French Woman / Additional Voices (uncredited)

Fred Kelsey as Party Guest (uncredited)

Barry Norton as Frenchman (uncredited)

Louis Mercier as Croupier (uncredited)

Oliver Cross as Casino Patron (uncredited)