They play husband and wife in their film, Scenes from a Marriage.
And Jessica Chastain and her on-screen love Oscar Isaac mirrored their characters as they put on a cosy display while attending the premiere for their movie during the 78th Venice International Film Festival on Saturday.
The actress, 44, looked incredible in a dazzling red strapless gown which boasted semi-sheer detailing all over, teamed with a glitzy diamond necklace.
Aw! Jessica Chastain and her on-screen love Oscar Isaac mirrored their characters as they put on a cosy display while attending the premiere for their movie during the 78th Venice International Film Festival on Saturday
The leading lady boosted her frame with a pair of towering red heels, while she otherwise kept her accessories to a minimum.
Jessica wore her flame-hued locks in a loose sleek style, while she accentuated her pretty features with a full pallet of make-up, including a red lip.
The two pals posed sweetly together on the red carpet as they cuddled up and laughed and joked while taking pictures.
Pose! The two pals posed sweetly together on the red carpet as they cuddled up and laughed and joked while taking pictures
Wow: The actress, 44, looked incredible in a dazzling red strapless gown which boasted semi-sheer detailing all over, teamed with a glitzy diamond necklace
Lady in red: The leading lady boosted her frame with a pair of towering red heels, while she otherwise kept her accessories to a minimum
Fire: Jessica wore her flame-hued locks in a loose sleek style, while she accentuated her pretty features with a full pallet of make-up, including a red lip
Earlier in the day, they appeared in high spirits as they attended the Scenes from a Marriage photo call.
The acting duo, who star alongside each other in the remake of the Ingmar Bergman film, larked about for the cameras.
Jessica looked stunning in a white sheer Giambattista Valli skirt suit for the red carpet event.
Hello! Jessica waved to fans as she passed on the red carpet
