Cillian Murphy is all set to join the cast of Christopher Nolan's next venture;the World War II movie, "Dunkirk." Besides Murphy, other actors who have confirmed their roles in the movie are Tom Hardy, Mark Rylance, Kenneth Branagh and the One Direction singer, Harry Styles.

According to Movie Web, "Dunkirk" will be Murphy's fifth collaboration with Nolan as he had acted in Nolan's psychological thriller "Inception" and the "The Dark Knight" Batman movies trilogy, in which he played the antagonist, Dr Jonathan Crane a.k.a. the Scarecrow.

Like Murphy, Tom Hardy is also one of the actors with whom Nolan regularly collaborates. Hardy has also worked in "Inception" and "The Dark Knight Rises" — the third movie in "The Dark Knight" trilogy, where he played the antagonist, Bane.

Mark Rylance, who won an Oscar for "Bridge of Spies," and Kenneth Branagh will appear in the movie in supporting roles. Not much has been revealed regarding the nature of the characters they will portray in the movie.

One Direction singer Harry Styles has been confirmed to play the lead role in the movie. Other newcomers who have joined the cast are Jack Lowden and Aneurin Barnard.

The script of "Dunkirk" has been written by Nolan himself, and besides directing the movie, he will be also co-producing it with his wife and producing partner Emma Thomas.

According to Den of Geek, the story of "Dunkirk" revolves around Operation Dynamo; a military evacuation mission in the early years of the World War II. During the operation, more than 300,000 soldiers from the British and French armies, who were captured by the German army, were evacuated across the English Channel in 1940.

The story of Operation Dynamo has been adapted to films previously too, including the 1958 movie "Dunkirk" starring John Mills and Richard Attenborough, and Joe Wright's "Atonement."

Produced by Warner Bros, "Dunkirk" will be shot on IMAX 65 mm and will be released in multiple formats. The movie is scheduled to be released in theatres on July 21, 2017.