Christopher Nolan’s war-themed biopic about the development of the atomic bomb, starring an all-star cast, will be released in a year.

Why did Cillian Murphy change his name?

It is said when he first began acting, he changed his name to Killian Scott to avoid confusion with another Irish actor, who was also named Cillian Murphy.

In Ireland, he rose to prominence as Tommy in Love/Hate, which premiered in 2010.

Cillian Murphy leads Oppenheimer with a poster that highlights his role as theoretical physicist J. Robert Oppenheimer, dubbed “the Father of the Atomic Bomb.” The film will be released in theaters on July 21.