Jessica Chastain Couples Up with Boyfriend Gian Luca Passi de Preposulo at amfAR Cannes Gala!

Jessica Chastain stuns in a backless gown while stepping out on the red carpet at the 2017 amfAR Gala held during the 2017 Cannes Film Festival at Hotel du Cap-Eden-Roc on Thursday (May 25) in Cap d'Antibes, France. The Oscar-nominated actress was joined at the event by her longtime boyfriend Gian Luca Passi de Preposulo