Actor Leonardo DiCaprio (R), actress Margot Robbie (C) and actor Brad Pitt pose during a photocall for "Once Upon a Time in Hollywood" during the 72nd Cannes Film Festival in Cannes, France, May 22, 2019. "Once Upon a Time in Hollywood" will compete for the Palme d'Or with 20 other films. (Xinhua/Gao Jing)