Carnage is a 2011 black comedy film directed by Roman Polanski, based on the Tony Award-winning 2006 play Le Dieu du carnage by French playwright Yasmina Reza. The screenplay is by Reza and Polanski. The film is an international co-production of France, Germany, Poland, and Spain. It stars Jodie Foster, Kate Winslet, Christoph Waltz, and John C. Reilly. In this comedy of errors, two sets of parents try to resolve a situation in a civilised manner as their idiosyncrasies rise to the surface.