The War With Grandpa is a family comedy film released in 2020. Directed by Tim Hill, the film stars Robert De Niro as Ed, who moves in with his family, leading to a comical conflict with his grandson Peter, played by Oakes Fegley. As Peter is forced to give up his room for Ed, he declares war to reclaim his space, resulting in a series of pranks and hilarious attempts to gain the upper hand.