Credit: Jemal Countess/Getty Images for TIME

Christopher Nolan is set to direct the upcoming action thriller Dunkirk, based on the 1940 evacuation of Allied soldiers in France.

Warner Bros. announced Monday that Nolan will helm the upcoming thriller from his own original script. Mark Rylance, Kenneth Branagh, and Tom Hardy are in talks to join the ensemble, but the lead roles, which have yet to be cast, will be headed by unknowns. Nolan and his longtime producing partner Emma Thomas are producing the film.

“We are thrilled to be continuing our collaboration with Christopher Nolan, a singular filmmaker who has created some of the most critically acclaimed and commercially successful films of all time,” said Greg Silverman, president of creative development and worldwide production for Warner Bros. “Dunkirk is a gripping and powerful story and we are excited to see Chris, Emma, and their cast realize it on the big screen.”

Shooting will begin in May at many of the real-life locations portrayed in the film, using a combination of IMAX 65mm and 65mm large format film photography. Dunkirk is set to hit theaters on July 21, 2017.