The 29-year-old actress was joined at the event by her co-star Sam Rockwell.
Keira stepped out the night before at the Grey Goose hosted party to celebrate her other festival movie, The Imitation Game. She was joined at the party by her handsome husband James Righton. They totally make a super cute couple!
FYI: Keira is wearing a Stella McCartney dress at the photo call. She is wearing a Chanel Haute Couture dress at the after party.