Though most Oscar contenders don't debut until the later this year, last year's Cannes Film Festival launched several films that became awards-season players, including Spike Lee's BlacKkKlansman and Pawel Pawlikowski's Cold War. With this year's edition of Cannes all sewn up last weekend, which films should Oscar-watchers look out for?

The biggest contender from the festival has got to be Quentin Tarantino's Once Upon a Time … in Hollywood, with Leonardo DiCaprio and Brad Pitt as faded showbiz figures navigating 1960s Hollywood. For its spot-on re-creation of that era, Oscar nominations in production and costume design are almost assured, and