Cary Grant
John Robie

Grace Kelly
Frances Stevens

Jessie Royce Landis
Jessie Stevens

John Williams
H. H. Hughson

Charles Vanel
Bertani

Brigitte Auber
Danielle Foussard

Jean Martinelli
Foussard

Georgette Anys
Germaine

René Blancard
Commissaire Lepic (uncredited)

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

Bess Flowers
Masquerade Party Guest (uncredited)

Charles Sherlock
Detective (uncredited)

Philip Van Zandt
Jewelry Clerk (uncredited)

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

Roland Lesaffre
Bertani Employee (uncredited)

John Alderson
Detective at the Costume Ball (uncredited)

Alberto Morin
Detective (uncredited)

Manuel París
Croupier (uncredited)

Gladys Holland
Elegant French Woman / Additional Voices (uncredited)

Fred Kelsey
Party Guest (uncredited)

Barry Norton
Frenchman (uncredited)