Film Music Reporter has learned that Alexandre Desplat has recently scored Roman Polanski’s upcoming black comedy Carnage. We have previously reported that Alberto Iglesias was attached to score the film according to a press release by Sony Pictures Classics in April, but it appears that the composer (who recently finished scoring the thriller Tinker, Tailor, Soldier, Spy) never wrote any music for the film. Carnage marks the second collaboration between Polanski and Desplat who worked together on the director’s last movie The Ghost Writer. The movie is based on the Tony-winning play God of Carnage by Yasmina Reza and stars Jodie Foster, Kate Winslet, Christoph Waltz and John C. Reilly. The film centers on two pairs of parents one of whose child has hurt the other at a public park, who meet to discuss the matter in a civilized manner. However, as the evening goes on, the parents become increasingly childish, resulting in the evening devolving into chaos. Carnage will be premiering next month at the Venice Film Festival and is set for a domestic release on November 18, 2011.

As previously reported, Desplat is also scoring George Clooney’s drama The Ides of March starring Ryan Gosling, Philip Seymour Hoffman, Paul Giamatti, Evan Rachel Wood, Marisa Tomei, Max Minghella and Jeffrey Wright. The movie about a young press spokesman who falls prey to backroom politics, the treacherous manipulations of veteran operatives and the seduction of a young intern has been selected to open the Venice Film Festival on August 31, 2011. Check out the trailer for the film below. The Ides of March will be released on October 7, 2011 by Sony Pictures. For updates on the project, visit the official movie website.