72 user 13 critic

The War with Grandpa (2020)

2:19 | Trailer

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Releases October 9, 2020
Upset that he has to share the room he loves with his grandfather, Peter decides to declare war in an attempt to get it back.


Tim Hill


Tom J. Astle (screenplay by), Matt Ember (screenplay by) | 1 more credit »
100 ( 9)





Cast overview, first billed only:
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
Juliocesar Chavez ... Billy
Isaac Kragten ... Steve
T.J. McGibbon ... Emma
Poppy Gagnon ... Jennifer
Lydia Styslinger ... Lisa
Joe Gelchion ... Chuck
Colin Ford ... Russell


Peter is thrilled that 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. With the help of his friends, Peter devises outrageous plans to make Grandpa surrender the room. But Grandpa is tougher than he looks. Rather than give in, Grandpa plans to get even.

Plot Summary | Add Synopsis


All he wanted was his room back. See more »


Comedy | Drama | Family

Motion Picture Rating (MPAA)

Rated PG for rude humor, language, and some thematic elements | See all certifications »

Did You Know?


The second movie Robert De Niro has starred in with the word "Grandpa" in the title. See more »


Ed demonstrates his ignorance of simple electronic devices, such as the self-checkout, an iPad and a drone. Yet he somehow manages to log on to his grandson's (presumably password protected) computer, find the game his grandson has been playing, enter it, locate and subsequently destroy the castle he has been building for 3 years. See more »


Christmas Time Is Here
Written by Vince Guaraldi, Lee Mendelson
Published by Lee Mendelson Film Productions
See more »

User Reviews

How on earth can this be a bad movie?
30 August 2020 | by frank-liesenborgsSee all my reviews

Yes it is predictable, yes the pranks are sometimes stupid etc. But do not tell me that you had high expectations for the plot? You knew this would be a simple and straightforward movie with an uncomplicated plot. You have a supercast, Robert De Niro, Uma Thurman, Rob Riggle, Jane Seymour and Christopher Walken. It is the same as going to see a LA Lakers game to see LeBron James playing. And at the same time you can enjoy watching the other superstars from the Lakers like Anthony Davis and Danny Green. This movie is very enjoyable to watch. Don´t have high expectations and you will be all right.

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Release Date:

9 October 2020 (USA) See more »

Also Known As:

The War with Grandpa See more »

Filming Locations:

Atlanta, Georgia, USA See more »


Box Office

Cumulative Worldwide Gross:

See more on IMDbPro »

Company Credits

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Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

1.85 : 1
See full technical specs »

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