Cary Grant
(John Robie) ,
Alfred Hitchcock
(Man Sitting Next to John Robie on Bus (uncredited)) ,
Grace Kelly
(Frances Stevens) ,
John Williams
(H. H. Hughson) ,
John Alderson
(Detective at the Costume Ball (uncredited)) ,
Georgette Anys
(Germaine) ,
Brigitte Auber
(Danielle Foussard) ,
René Blancard
(Commissaire Lepic (uncredited)) ,
George Boyce
(Party Guest (uncredited)) ,
William 'Wee Willie' Davis
(Big Man in Kitchen (uncredited)) ,
Bess Flowers
(Masquerade Party Guest (uncredited)) ,
Jessie Royce Landis
(Jessie Stevens) ,
Roland Lesaffre
(Bertani Employee (uncredited)) ,
Jean Martinelli
(Foussard) ,
Alberto Morin
(Detective (uncredited)) ,
Manuel París
(Croupier (uncredited)) ,
Bernard Sell
(Casino Patron (uncredited)) ,
Charles Sherlock
(Detective (uncredited)) ,
Philip Van Zandt
(Jewelry Clerk (uncredited)) ,
Charles Vanel
(Bertani)