The War with Grandpa (2020) is a light-hearted family comedy that explores the funny, chaotic, and sometimes emotional challenges that arise when generations clash under one roof. Adapted from the book of the same name, the film blends slapstick humor with a heartfelt message about family relationships.
Detailed Summary
Grandpa Moves In and Takes Over the Room
After accidentally causing trouble at a grocery store because he can no longer drive safely, Ed Marino (Robert De Niro) moves in with his daughter and her family. His grandson Peter is forced to give up his bedroom and live in the attic. Feeling robbed of his space and privacy, Peter becomes determined to reclaim his room.
A Declaration of War
Peter writes a formal “war declaration” letter to his grandpa, challenging him to battle for the room. To Peter’s surprise, Ed accepts, and what begins as harmless pranks soon escalates. The two start sabotaging each other’s daily routines: Peter messes with Ed’s shaving supplies, while Ed retaliates by messing with Peter’s school project.
Escalating Chaos and Family Fallout
The war intensifies as Ed enlists the help of his older friends, leading to a hilarious paintball battle. The tension slowly starts crossing boundaries. Peter begins to feel guilty, but neither side wants to admit defeat. Eventually, one final prank goes too far, causing damage during his little sister’s birthday party. The family finally learns the truth about the war.
Movie Ending
At the end of the film, Ed and Peter admit their actions and talk honestly about their feelings. Ed confesses that grieving the loss of his wife made it hard for him to adjust, while Peter admits he never wanted to hurt him—he just wanted his room back. Ed agrees to move to the basement, giving Peter his room again, and their relationship begins to genuinely grow.
However, the moment they believe peace has been restored, the film ends with Peter’s friend launching a new prank war against Grandpa, hinting that the battle may continue. The movie ends on a humorous note, reinforcing that the competitiveness hasn’t completely disappeared, but now carries a friendlier tone.
Are There Post-Credits Scenes?
There is no post-credits scene, but an extended blooper-style segment plays during the credits, showcasing humorous behind-the-scenes moments.
Type of Movie
This film is a family comedy that focuses on generational conflict and reconciliation through comedic pranks. It delivers a mix of physical gags, heartfelt moments, and simple life lessons.
Cast
- Robert De Niro as Ed Marino
- Oakes Fegley as Peter
- Uma Thurman as Sally
- Christopher Walken as Jerry
- Jane Seymour as Diane
- Rob Riggle as Arthur
- Laura Marano as Mia
Film Music and Composer
The score was created by Johan Söderqvist, known for blending light, playful musical themes with warm, emotional tones. The soundtrack helps balance the humorous rivalry with more sentimental moments.
Filming Locations
Filming took place primarily in Atlanta, Georgia, and surrounding neighborhoods that reflect a typical American suburban home environment. The simple, familiar setting supports the film’s focus on everyday family life rather than large-scale cinematic spectacle.
Awards and Nominations
While the film did not receive major mainstream awards, it gained attention for its cast performances in children’s media circles and was recognized by family-oriented award platforms for its entertainment value among young audiences.
Behind the Scenes Insights
- Robert De Niro accepted the role because he wanted to make more projects his grandchildren could watch.
- Some pranks were choreographed to resemble classic slapstick comedies, mirroring inspirations like Home Alone.
- The film’s release was delayed multiple times due to studio restructuring and later, the pandemic.
- Christopher Walken improvised several of his humorous one-liners.
Inspirations and References
The movie is based on the 1984 children’s book by Robert Kimmel Smith, which tells a simpler and more straightforward version of the prank war. The film expands the story with additional side characters, exaggerated gags, and a more emotional focus on grief and aging.
Alternate Endings and Deleted Scenes
Some early drafts featured a more sentimental conclusion without the final prank hinting at a continued war. Deleted scenes mostly included extended pranks that were cut to avoid making the conflict feel too aggressive or repetitive.
Book Adaptation and Differences
- Unlike the book, the film adds Grandpa’s group of friends, increasing comedic chaos.
- The book portrays the war more internally through Peter’s thoughts, while the film externalizes it through elaborate pranks.
- The emotional storyline about Grandpa’s grief is emphasized more heavily in the movie.
Memorable Scenes and Quotes
Key Scenes
- Grandpa’s first reaction to Peter’s formal war declaration letter.
- The trampoline prank gone wrong at the birthday party.
- The chaotic paintball battle with Ed’s friends.
- Peter breaking down and confessing why he started the war.
Iconic Quotes
- Grandpa Ed: “I’m old, not dead.”
- Peter: “I’m not giving up my room without a fight.”
- Jerry (Walken): “The secret to war is never letting them see you coming.”
Easter Eggs and Hidden Details
- The subtle nod to Home Alone in the prank setup involving marbles.
- De Niro’s line about “better movies in my day” pokes fun at his own legendary film history.
- Mia’s makeup scene includes movie posters referencing teen classics, hinting at generational gaps in pop culture.
Trivia
- The film was shot in 2017 but released in 2020.
- Oakes Fegley (Peter) also starred in Pete’s Dragon before this role.
- Uma Thurman and Robert De Niro previously appeared together in Mad Dog and Glory (1993).
Why Watch?
Because it delivers a fun, light, and relatable depiction of family conflicts, without harsh tones. It’s a perfect watch for families looking for comedy that isn’t mean-spirited but still entertaining. The performances from legendary actors like De Niro and Walken elevate simple humor into something memorable.
Director’s Other Movies
- Hop (2011)
- Alvin and the Chipmunks (2007)
- Garfield: A Tail of Two Kitties (2006)
- Max Keeble’s Big Move (2001)
Recommended Films for Fans
- Home Alone (1990)
- Diary of a Wimpy Kid (2010)
- Daddy’s Home (2015)
- Cheaper by the Dozen (2003)
- Alexander and the Terrible, Horrible, No Good, Very Bad Day (2014)
