Bradley Cooper has signed on to star in the World War II drama “Atlantic Wall” as an American paratrooper operating behind enemy lines.

Gavin O’Connor will direct from a Black List script by Zach Dean. Producers are Imperative Entertainment’s Dan Friedkin and Bradley Thomas, along with Madhouse Entertainment’s Adam Kolbrenner.

The movie will center on a paratrooper, stranded behind enemy lines hours before D-Day and tasked with delivering intelligence critical to the outcome of the war. He’s also compelled to fulfill a promise to protect the young son of a murdered ally.

“We’re thrilled Imperative is bringing ‘Atlantic Wall’ to life on screen with a talented filmmaker like Gavin,” Friedkin said. “Bradley’s phenomenal track record speaks for itself. He’s perfect to portray our complicated, often reluctant hero. We can’t imagine better creative partners.”

Cooper starred as a marksman in “American Sniper,” and is toplining and directing the remake of “A Star Is Born” with Lady Gaga. That project is set for a 2018 release.

Cooper is currently producing and developing, “Black Flags, The Rise of ISIS” with HBO. He will reprise his role as Rocket Raccoon in Disney-Marvel’s “Guardians of the Galaxy 2,” to be released in May.

O’Connor directed Ben Affleck in the thriller “The Accountant” for Warner Bros. Previous credits include “Warrior” and “Jane Got a Gun.”

Cooper will exec produce “Atlantic Wall” with Joint Effort producing partner Todd Phillips. Joint Effort is based at Warner Bros.

Imperative said it plans to co-finance the film. It also plans to shoot on location in Normandy.

Cooper is represented by CAA, and O’Connor is repped by WME. Dean is repped by WME, Madhouse, and attorney Andrew Hurwitz. The news was first reported by Deadline Hollywood.