Wait, what year is this? We only ask because we just saw the gorgeous, salmon-colored Saint Laurent gown that Jessica Chastain wore to the European premiere of [1]Interstellar [2], and immediately felt like we took a trip back in time.

The dress, which also features a silver, one-shoulder strap and tiny slit on top, is so simple yet stunning, bringing us back to the glamorous days of old Hollywood. As for the accessories, she couldn't have completed the look more perfectly, opting for tiny star studs instead of overpowering jewels. See her whole outfit — from every beautiful angle — below.

Jessica Chastain

Jessica Chastain

Jessica Chastain

Jessica Chastain

Jessica Chastain