Deadline.com reports that Reilly ("Chicago," "Magnolia," "Walk Hard") will star as Michael (played on Broadway by James Gandolfini) opposite the previously announced Jodie Foster as his wife, Veronica.
"God of Carnage" will also feature Kate Winslet and Christoph Waltz, as Annette and Alan, respectively.
Reza and director Roman Polanski are collaborating on the film, which will be set in Brooklyn, but will begin shooting in Paris in January 2011. God of Carnage was originally set in Paris when it premiered in London, but changed to Brooklyn when the production made its Broadway transfer in 2009.
God of Carnage centers on two sets of upper-middle class parents who attempt and fail to resolve a playground dispute between their children. A discussion over coffee and clafoutis turns into an animalistic battle of the sexes.
God of Carnage opened to raves on Broadway March 22, 2009, where it played to sold-out houses with its original cast. The production closed June 6, 2010, after 452 regular performances and 24 previews. The original Broadway cast included Marcia Gay Harden, James Gandolfini, Jeff Daniels and Hope Davis. The Broadway production was directed by Matthew Warchus, who earned a Tony for his work. The dramatic comedy also took the Tony Award for Best Play.