The War with Grandpa tell story about "Sixth-grader Peter is pretty much your average kid—he likes gaming, hanging with his friends and his beloved pair of Air Jordans. But when his recently widowed grandfather Ed moves in with Peter’s family, the boy is forced to give up his most prized possession of all, his bedroom. Unwilling to let such an injustice stand, Peter devises a series of increasingly elaborate pranks to drive out the interloper, but Grandpa Ed won’t go without a fight..".
Cast : Robert De Niro, Uma Thurman, Christopher Walken, Jane Seymour, Oakes Fegley, Laura Marano, Rob Riggle, Cheech Marin, T.J. McGibbon, Isaac Kragten, Juliocesar Chavez, Lydia Styslinger, Heather Johansen, Colin Ford, Gage Lawson, Poppy Gagnon, Faizon Love
- Runtime : 94 minutes (1' 34")
- Genre : Comedy Family Drama
- Production : Marro Films Emmett/Furla Films Tri G West Madison Entertainment
- Release : August 27, 2020
- Countries : United States of America
- Languages : English