CNN  —  The red carpet has officially been rolled out across the Promenade de Croisette, welcoming stars to the French Riviera for the annual Cannes Film Festival. Now in its 78th year, the event is a jewel in the calendar of both lofty cinephiles and polished fashionistas. Over 12 days, actors, directors, producers, influencers and the like will descend onto the carpeted steps — not just to promote their latest feature film at the high temple of world cinema, but also to turn a look. This year,