Christopher Nolan’s highly-anticipated war-drama finally released an official trailer, showing off the cinematic stylings and large ensemble cast that will bring the story to the big-screen next year.

Warner Bros. Pictures’ released the first full-length trailer for “Dunkirk” this week. The film was directed by Christopher Nolan, who also wrote the original screenplay for the project.

Billed as an action-thriller, “Dunkirk” was shot on a combination of IMAX 65mm and 65mm large format film photography, Nolan has been a long-time advocate of saving traditional film-media in the industry, and is also producing the film with his longtime producing partner Emma Thomas.

The movie opens as hundreds of thousands of British and Allied troops are surrounded by enemy forces. Trapped on the beach with their backs to the sea they face an impossible situation as the enemy closes in. “Dunkirk” features Tom Hardy (“The Revenant,” “Mad Max: Fury Road,” “Inception”), Mark Rylance (“Bridge of Spies,” “Wolf Hall”), Kenneth Branagh (“My Week with Marilyn,” “Hamlet,” “Henry V”) and Cillian Murphy (“Inception,” “The Dark Knight” Trilogy), as well as newcomer Fionn Whitehead.

The ensemble cast also includes Aneurin Barnard, Harry Styles, James D’Arcy, Jack Lowden, Barry Keoghan and Tom Glynn-Carney.Jake Myers (“The Revenant,” “Interstellar,” “Jack Reacher”) is serving as executive producer.

The behind-the-scenes creative team includes director of photography Hoyte van Hoytema (“Interstellar,” “Spectre,” “The Fighter”), production designer Nathan Crowley (“Interstellar,” “The Dark Knight” Trilogy), editor Lee Smith (“The Dark Knight” Trilogy, “Elysium”), costume designer Jeffrey Kurland (“Inception,” “Bullets Over Broadway”), and visual effects supervisor Andrew Jackson (“Mad Max: Fury Road”). Fans of the genre, and of Christopher Nolan, can watch the first official-trailer below, or on the Warner Bros. YouTube channel.

Warner Bros. Pictures is distributing “Dunkirk” worldwide and has slated the film for a July 21, 2017 release. The film will be released theatrically on IMAX, 70mm, 35mm and all other screens.