Movie guide
The War with Grandpa (2020): movie guide
The War with Grandpa (2020) is a Comedy, Family running about 98 minutes. It holds a TMDB score of 6.4/10 from 1,112 votes. Notable cast includes Robert De Niro, Uma Thurman, Rob Riggle, Oakes Fegley. Cinema Box covers trailers, cast, and details for discovery — not full streaming.
- Released: 2020-08-27
- Runtime: 98 min
- TMDB: 6.4/10
- Genres: Comedy, Family
Last updated: 2026-11-11 · First listed: 2020-08-27
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What is The War with Grandpa 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.
Cast highlights
The War with Grandpa features Robert De Niro, Uma Thurman, Rob Riggle, Oakes Fegley, Laura Marano, Cheech Marin. Open the Cinema Box title page for the full cast list and character credits.
Key facts
Release date: 2020-08-27. Runtime: 98 minutes. TMDB score: 6.4/10 (1,112 votes). Genres: Comedy, Family. Original language: en. Status: Released.
Discover The War with Grandpa on Cinema Box
Cinema Box is a movie and TV discovery app for Android. Use it to browse The War with Grandpa, watch official trailers when available, save titles to your list, and plan what to watch — without hosting or streaming full films.
Frequently asked questions
- What genre is The War with Grandpa?
- The War with Grandpa is listed as Comedy, Family on TMDB.
- How long is The War with Grandpa?
- The War with Grandpa runs about 98 minutes.
- Who stars in The War with Grandpa?
- Cast highlights include Robert De Niro, Uma Thurman, Rob Riggle, Oakes Fegley, Laura Marano, Cheech Marin.
- Does Cinema Box stream The War with Grandpa?
- No. Cinema Box is discovery-only — trailers, details, ratings, and watchlists. It does not host or stream full movies.
- Where can I track The War with Grandpa?
- Open the The War with Grandpa page on cinemabox.app or install the official Cinema Box Android app from Google Play for watchlists and discovery tools.
