It is official, AR Rahman would compose music for Ishaan Khatter, Mrunal Thakur, and Priyanshu Painyuli's Pippa, a war film. Pippa is the book adaptation of 'The Burning Chaffees,' written by Brigadier Balram Singh Mehta. The film is jointly produced by Ronnie Screwvala and Siddharth Roy Kapur.