Each May, the Cannes Film Festival turns the French Riviera into a catwalk of cinematic prestige and high fashion. But beyond the glitz lies a strict dress code. From mandatory tuxedos and heels on the red carpet to bans on flats, sheer outfits, and oversized gowns, Cannes enforces its fashion rules seriously. While some standards are relaxing, tradition still reigns. At Cannes, what you wear is part of the story—sometimes as much as the films themselves.