Owen Wilson, Marion Cotillard, Rachel McAdams, Kathy Bates and Michael Sheen are among those already cast, as is the first lady of France, Carla Bruni-Sarkozy.
The film is about a family traveling to the City of Lights for business. The party includes a young engaged couple forced to confront the illusion that a life different from their own is better. Sources describe Brody's role as "flashy."
Letty Aronson, Steve Tenenbaum and Jaume Roures are producing the film, which reunites Brody with his "The Darjeeling Limited" and "Fantastic Mr. Fox" co-star Wilson.
Brody, who is repped by Paradigm and Red Hawk Management, next stars in the Warner Bros. sci-fi thriller "Splice," due out June 4, followed by the July 9 release of Fox's "Predators." He won a best actor Oscar for his role in Roman Polanski's "The Pianist."
-- The Hollywood Reporter