This is a great movie with wonderful performances by a handsome Cary Grant and a stunning Grace Kelly, who plays a witty young American (she's not playing!). That Kelly thinks of settling in Monaco in the film and later became the real Princess of Monaco makes one suspect that she wanted to make permanent the sort of life she acted in this brilliant psychological thriller. The theme of thievery is subtly parsed by hitchcock, who alludes to its erotic overtones and who, in general, is operating, like Shakespeare on a double level: you can enjoy it on the level of action and drama, and yet there is much more than meets the eye as jewels, money, possession, playing hard (and easy) to get, and the thrill of the chase are all mirrored in the register of romance. The cut to fireworks over the water outside the window as Grace wears fake diamonds but makes real love may have laid the way for the greatest cinematic cliche, but here it is far more than that: the shimmering water, shining eyes, crackling fireworks, and sparkling theme of beauty's temporary nature contrasted with desire's undying love come together perfectly. Like Shakespeare, Hitchcock's works seem infinitely rich and nuanced. A great, subtly deep romance from the master (watch for him on the bus early on) of film.