Dunkirk is a 2017 historical war thriller film written, directed, and co-produced by Christopher Nolan that depicts the Dunkirk evacuation of World War II from the perspectives of the land, sea, and air. It features an ensemble cast including Fionn Whitehead, Tom Glynn-Carney, Jack Lowden, Harry Styles in his feature film debut, Aneurin Barnard, James D'Arcy, Barry Keoghan, Kenneth Branagh, Cillian Murphy, Mark Rylance, and Tom Hardy.

The film portrays the evacuation with little dialogue, as Nolan sought instead to create suspense through cinematography and music. Filming began in May 2016 in Dunkirk and wrapped that September in Los Angeles, when post-production began. Cinematographer Hoyte van Hoytema shot the film on IMAX 65 mm and 65 mm large-format film stock. Dunkirk has extensive practical effects. It employed thousands of extras as well as historic boats from the evacuation, and period aeroplanes.

Distributed by Warner Bros. Pictures, Dunkirk premiered at Odeon Leicester Square in London, a few days before its release in the United Kingdom and United States on 21 July 2017. It grossed over $530 million worldwide, making it the highest-grossing World War II film until it was surpassed by Nolan's Oppenheimer (2023). Dunkirk received praise for its screenplay, direction, editing, score, sound design and cinematography; some critics called it Nolan's best work, and one of the greatest war films as well as one of the greatest movies of the 2010s. It received various accolades, including eight nominations at the 90th Academy Awards, including Best Picture and Best Director. It went on to win for Best Sound Editing, Best Sound Mixing, and Best Film Editing.