Jessica Chastain attended celebrations for the movie, “Killer Joe” during the Toronto Film Festival at the vitaminwater rooftop on Sunday.

The actress stunned in a vintage Yves Saint Laurent Rive Gauche dress from Decades Inc.

Her cranberry dress with deep plunging neckline has a large gold coral design Goossens broach with a large red jewel in the center.

She accessorized with metallic strappy Jimmy Choo heels and wore her hair in soft, pretty waves.

Jessica’s is becoming more confident on the red carpet and this shows as her style continues to improve.

This is definitely one of my favourite looks on her and there’s an even more exciting one to come.

Credit: Getty