Harry Styles was asleep ‘90%’ of the time while filming Christopher Nolan’s Dunkirk

Harry Styles said he dozed off in the sea while filming Christopher Nolan’s Dunkirk.

Harry Styles said he dozed off in the sea while filming Christopher Nolan’s Dunkirk.

This image released by Warner Bros. Pictures shows Harry Styles, from left, Aneurin Barnard and Fionn Whitehead in a scene from Dunkirk. (AP)

The 23-year-old musician, who is making his feature film debut with the Christopher Nolan-directed film, said he was so exhausted due to the strenuous shooting schedule that he ended up nodding off with the camera on, reported People magazine.

“Boats, sides of boats, swimming... I definitely fell asleep while floating a couple times. It was nice, good, refreshing.

English singer, songwriter and actor Harry Styles poses on July 16, 2017, during a photo-call in Dunkirk.

“I slept most of... I’d say 90% of what wasn’t filming, I was asleep,” Styles said.

The Sign Of The Times singer plays a young soldier, Alex, stranded on the beach at Dunkirk with other warriors from the Allied forces.