Peter is thrilled that his 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.
Robert De Niro
Ed
Uma Thurman
Sally
Rob Riggle
Arthur
Oakes Fegley
Peter
Laura Marano
Mia
Cheech Marin
Danny
Jane Seymour
Diane
Christopher Walken
Jerry
