LOS ANGELES, Calif. -- Keira Knightley has joined forces with her 'Atonement' and 'Pride & Prejudice' director, Joe Wright, to take a stand against domestic violence in a shocking new PSA. The two-minute short film, which debuts on April 6 in the UK, depicts Knightley acting in a scene where her boyfriend attacks her. After the first hit, Knightley breaks character and looks at the camera, saying, 'Sorry, we didn't agree to that,' referring to the sudden strike to her face.