Motor Representation in Acting Together

People walk, build, paint and otherwise act together with a purpose in myriad ways. What is the relation between the actions people perform in acting together with a pur- pose and the outcome, or outcomes, to which their actions are directed? We argue that fully characterising this relation will require appeal not only to intention, knowledge and other familiar philosophical paraphernalia but also to another kind of representa- tion involved in preparing and executing actions, namely motor representation. If we are right, motor representation plays a central role in the story of acting together.