The Cannes Film Festival has played been the site of numerous glittering parties this week. And Jessica Chastain channeled vintage Hollywood glamour in a floor-length emerald gown as she attended the Chopard party during the festival on Friday night. The Molly's Game star, 44, was joined by Maggie Gyllenhaal, 43, at the A-list event and the pair posed arm in arm in a selection of impressive jewels. Stunning: Jessica Chastain channeled vintage Hollywood glamour in a floor-length emerald gown as she attended the Chopard party during the festival on Friday night Jessica looked stunning in the green satin maxi dress which featured a cut out detail on the torso to showcase her taut abs.