Kristen Stewart is in talks to star in an adaptation of Ben Fountain's best-selling novel Billy Lynn's Long Halftime Walk, with another report revealing that Ben Platt has joined the cast. They will join newcomer Joe Arwyn as the title character, along with Garrett Hedlund and Steve Martin. Production is scheduled to begin later this month.

The story centers on 19-year-old Billy Flynn (Joe Arwyn), an infantryman who survives a firefight during the Iraq war in 2005. Billy and his surviving comrades are brought back to the U.S. by the Bush Administration for a "victory tour" that ends at the Dallas Cowboys stadium, where they are to be honored during halftime of the Thanksgiving football game, before going back to Iraq. Kristen Stewart will play Billy's older sister Kathryn, while Ben Platt is playing Josh, who works for the Dallas Cowboys organization and is in charge of taking care of Billy's squad during the tour.

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Ang Lee is directing from an adapted screenplay by Simon Beaufoy (The Hunger Games: Catching Fire), with the director also producing with Marc Platt, Stephen Cornwell, Rhodri Thomas and Simon Cornwell. Kristen Stewart most recently starred in Still Alice and she will next be seen in American Ultra. Ben Platt will reprise his Pitch Perfect role as Benji Appelbaum in next month's sequel Pitch Perfect 2, and he also stars in the upcoming Ricki and the Flash.