So much to like about this film- a great plot, settings, dialogue and cast. Walter Matthau is great as are the rest of the cast, even the Parisian policeman is a treat. The main bugbear for me is the age gap between Cary Grant and Audrey Hepburn, it's just too much, 25 years! She looks like she's snogging her dad! I love Grant but they should either have cast a younger actor, or older actress, or just cut out the romantic aspect between the leads. But maybe audiences in 1963 just wouldn't have accepted the leads being just good friends come the end of the film.