Peter is thrilled that Grandpa is coming to live with his family. That is, until Grandpa moves into Peter's room, forcing him upstairs into the creepy attic. And though he loves his grandpa he wants his room back - so he has no choice but to declare war. With the help of his friends, Peter devises outrageous plans to make Grandpa surrender the room. But Grandpa is tougher than he looks. Rather than give in, Grandpa plans to get even. Buy The War With Grandpa movie tickets and get showtimes at Cineworld cinemas, on the Cineworld mobile app or online. Discover movie trailers and view upcoming movies at www.cineworld.com. Stop by a Cineworld cinema near you today.