Actors Benedict Cumberbatch, Colin Firth and Richard Madden have joined Sam Mendes’ World War I drama 1917. The film also features Mark Strong and Andrew Scott, reported Variety. DreamWorks Pictures and Universal Pictures announced Thursday that the film will start shooting on April 1 in England and Scotland. The film follows two young British soldiers, previously announced as being played by George MacKay and Dean-Charles Cahapman, on a single day at the peak of World War I. Mendes penned the script with Krysty Wilson-Cairns, and will also produce the film.