(from left) Blake (Dean-Charles Chapman) and Schofield (George MacKay) in 1917, the new epic from Oscar®-winning filmmaker Sam Mendes.

(from left) Dean-Charles Chapman, George MacKay and Oscar®-winning filmmaker Sam Mendes on the set of the new epic, 1917.

Colin Firth as General Erinmore in 1917, the new epic from Oscar®-winning filmmaker Sam Mendes.

(foreground) Cinematographer Roger Deakins on the set of 1917, the new epic from Oscar®-winning filmmaker Sam Mendes.

Cast and crew members on the set of 1917, the new epic from Oscar®-winning filmmaker Sam Mendes.

Benedict Cumberbatch as Colonel Mackenzie in 1917, the new epic from Oscar®-winning filmmaker Sam Mendes.

Script supervisor Nicoletta Mani (left) and co-screenwriter Krysty Wilson-Cairns (right) with Oscar®-winning filmmaker Sam Mendes on the set of Mendes’ new epic, 1917.

Mark Strong as Captain Smith in 1917, the new epic from Oscar®-winning filmmaker Sam Mendes.