Driven by the star-powered chemistry of Audrey Hepburn and Cary Grant, Stanley Donen’s Charade is a classy, glossy combination of breezy comic romance and gripping suspense. Hepburn is effortlessly luminous as the American translator living in Paris who gets embroiled in a treasure hunt-type plot when her husband is murdered, while Grant swaggers as the mysterious stranger who uses his suave, greying composure to charm his way into her life -- perhaps with an ulterior motive. Watching Grant and Hepburn wittily bouncing off each other guarantees instant fireworks, with Grant pretty good at toying with where the viewer’s sympathies lie. The trio of crooks after the loot -- played by James Coburn, George Kennedy and Ned Glass -- are well-cast. As the hook-handed Scobie, Kennedy is menacing, and gets an exciting rooftop fight with Grant that’s surprisingly violent. Also featuring a fantastic Walter Matthau, a smart script with full of twists, and a seriously groovy Henry Mancini score, Charade is an enormously fun mystery-thriller that deserves its tag as one of the best films Hitchcock never made.