A Grace Kelly, Alfred Hitchcock jag from Rear Window, and Cary Grant from Notorious. Everyone goes to the French Riviera and the result is worse than when Audrey went to Paris (either time). Cary plays a retired cat burgler, noble due to an association with The Resistance, and despite being seriously north of 40, the young ladies (Kelly and Frenchwoman Brigitte Auber) can't help themselves. It's all a bit vacuous, but aren't the gowns, jewels, landscapes, etc. just fabulous.
Bosley Crowther got overly enthused at the time.