Charade - Cary Grant, Audrey Hepburn
Available on Prime Video
After Regina Lampert (Audrey Hepburn) falls for the dashing Peter Joshua (Cary Grant) on a skiing holiday in the French Alps, she discovers upon her return to Paris that her husband was murdered. Soon, she and Peter are giving chase to three of her late husband's World War II cronies, who are after a fortune the quartet stole while behind enemy lines. But why does Peter keep changing his name?