Idris Elba is set to star in African drama Beasts Of No Nation.
The Luther star, who will also help produce the film, will take the lead role of Commander in the big-screen adaptation of Uzodinma Iweala's novel, reported Deadline.
Jane Eyre and Sin Nombre filmmaker Cary Fukunaga will direct the movie, which follows a young boy Agu when he is forced to join a group of mercenary fighters when civil war engulfs his West African country.
As he faces the death of his father and the disappearance of his mother and sister, he makes friends with a mute boy named Strika, so they can face the crimes and hardships of war together.
Cary, who is directing the HBO series True Detective, said: "This project has been seven years in the making, so to say I'm excited to start shooting this - and with Idris Elba as lead - would be me trying to play it cool."
Producer Daniela Taplin Lundberg from Red Crown Productions added: "We fell in love with Iweala's powerful narrative and Idris and Cary are a tremendous pairing."
Idris, who reprised his role as Detective Chief Inspector John Luther in BBC show Luther and starred in Guillermo del Toro's Pacific Rim, will next be seen as Nelson Mandela in the biopic Mandela: Long Walk To Freedom.