The War with Grandpa
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.
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The War with Grandpa (2020) is a comedy, family movie running 1h 38m. Starring Robert De Niro, Uma Thurman, Rob Riggle. Rated 6.4/10 on TMDB. Watch it online free on ZapFlix.