Michael Billington, Pinter's friend and biographer, said he was "devastated and saddened" by the news.

BBC: UK playwright Harold Pinter dies

The Guardian's Michael Billington says the actor is "excellent" in the Donmar Warehouse's "outstanding" revival of Eugene O'Neill's Anna Christie.

BBC: Jude Law impresses critics in new play Anna Christie

According to Michael Billington in the Guardian, Knightley and Moss " prove as potent a combination on stage as at the box office".

BBC: Keira Knightley 'wins spurs' with West End stage return