It’s only a little over a week before one of the year’s biggest plays – Ian Rickson’s revival of Lillian Hellman's 1934 play The Children's Hour, starring Keira Knightley and Mad Men’s Elisabeth Moss as girls’ boarding school teachers accused of having a lesbian affair – officially opens, but here’s a sneak-peek at production pics from the period piece. Knightley and Moss are joined by a stellar cast that also features Tobias Menzies, Ellen Burstyn and Carol Kane. The Children's Hour opens on 9 February 2011 (previews from 22 January) at the West End’s Comedy Theatre, where it will plays a limited season until 30 April.