Find where to watch The War with Grandpa (2020), a movie. Check streaming availability, rental, and purchase options on WhereCanIWatch.tv.
About
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.
Expect a chaotic clash of domestic wills as a young boy wages a relentless campaign to reclaim his bedroom from a stubborn patriarch. This slapstick skirmish turns a typical family home into a battlefield of petty pranks and bedroom territory.
Trailer
Director
Tim Hill
Cast
Robert De Niro, Uma Thurman, Rob Riggle, Oakes Fegley, Laura Marano, Cheech Marin, Jane Seymour, Christopher Walken, Juliocesar Chavez, Isaac Kragten
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0 options ranked by value · 🇺🇸 United States
Last verified 12 days ago
The War with Grandpa
IMDb
6.4/10
RT Critics
29%
Metacritic
Director
Tim Hill
Cast
Robert De Niro, Uma Thurman, Rob Riggle, Oakes Fegley, Laura Marano, Cheech Marin, Jane Seymour, Christopher Walken, Juliocesar Chavez, Isaac Kragten
0 options ranked by value · 🇺🇸 United States
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Keep browsing: New Releases · Popular Movies · Comedy · Family
friendship · birthday · grandfather · teenage girl · family · family conflict · attic · changing room · resentment
The War with Grandpa (2020) streaming availability is currently being verified. Availability last verified July 6, 2026.