Keira Knightley: 'Children's Hour' Press Night with Elisabeth Moss!

Keira Knightley attends the after party following the press night of her play The Children’s Hour at The Penthouse on Wednesday (February 9) in London.

The 25-year-old actress was joined by her costar, Mad Men‘s Elisabeth Moss.

The Children’s Hour is about “an angry student who runs away from the school and to avoid being sent back, she tells her grandmother that the two headmistresses (Knightley and Moss) are having a lesbian affair.”

Ellen Burstyn and Carol Kane also star in the drama.

FYI: Keira is wearing a black chiffon dress with an embroidered back by Chanel.