Styles made his feature-film debut in "Dunkirk," which follows a group of soldiers during the Dunkirk evacuation of World War II. The singer portrays a British soldier named Alex in the 2017 film. According to The Hollywood Reporter, while Nolan knew who Styles was before casting him, he wasn't aware "of how famous" he really was until later on. "I cast Harry because he fit the part wonderfully and truly earned a seat at the table," Nolan said.