Actress Jessica Chastain attends "The Martian" premiere during the 2015 Toronto International Film Festival at Roy Thomson Hall on September 11, 2015 in Toronto, Canada.
(September 10, 2015 - Source: Kevin Winter/Getty Images North America) see more angles »

Jessica Chastain Cocktail Dress

Jessica Chastain exuded classic elegance at the TIFF premiere of 'The Martian' in a blue velvet cocktail dress with a sheer, patterned bodice.
Brand: Givenchy

Jessica Chastain Evening Sandals

Jessica Chastain matched her frock with blue satin ankle-strap sandals.