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The Grim Adventures of Billy & Mandy
The Grim Adventures of Billy & Mandy (2026) Theatrical poster
Theatrical release poster
Directed by Randy Myers
Produced by Maxwell Atoms
Screenplay by Maxwell Atoms
Story by A.D. Wylie
Based on The Grim Adventures of Billy & Mandy
by Maxwell Atoms
Starring Greg Eagles
Richard Steven Horvitz
Grey DeLisle
Vanessa Marshall
Armin Shimerman
Phil LaMarr
Frank Welker
C. H. Greenblatt
Jennifer Hale
Dee Bradley Baker
Music by Lorne Balfe
Edited by Bobby Gibis
Production companies Amblin Entertainment (credit only)
Amblin Animation
Cartoon Network Studios
Distributed by Universal Pictures
Release date July 3, 2026
Running time 80 minutes
Country United States
Language English
Budget $20 million
Box office $195 million

The Grim Adventures of Billy & Mandy is a 2026 American animated adventure fantasy comedy horror film based on the TV series of the same name by Maxwell Atoms. Produced by Amblin Animation and Cartoon Network Studios and distributed by Universal Pictures. It was the first feature film from Amblin Animation, a successor to Amblimation.

Greg Eagles, Richard Steven Horvitz, Grey DeLisle, Vanessa Marshall, Armin Shimerman, Phil LaMarr, Frank Welker and C. H. Greenblatt reprise their roles from the series. The film's plot follows Grim with Billy, Mandy and the gang travelling to Bunny Island to get four diamonds back from Hector Con Carne who’s planning to destroy the world.

The film was released in the United States on July 3, 2026. It received generally positive reviews, and was a box office success, earning $195 million worldwide against its $20 million budget. It became the first Cartoon Network film to make over $100 million dollars at the box office.

Plot

Taking place after the series, in Bunny Island, Hector Con Carne plans to steal four diamonds so he can take over and destroy the world. So it's up for Grim, Billy, Mandy and the gang to go on a mission to get four diamonds back from Hector Con Carne, defeat him and save the world.

Cast

Production

The film was produced in a 2.35:1 aspect ratio, making it Cartoon Network's first traditionally animated film to be featured in that widescreen format.

Animation

The film's animation was done by Rough Draft Korea Co. Ltd. and Digital eMation.

Casting

The series' cast members Greg Eagles, Richard Steven Horvitz, Grey DeLisle, Vanessa Marshall, Armin Shimerman, Phil LaMarr, Frank Welker, C. H. Greenblatt, Jennifer Hale and Dee Bradley Baker reprise their roles.

Music

Lorne Balfe, known for his composing on DreamWorks’ Home by Tim Johnson, composes the film’s score. Lorne Balfe was tasked to capture the music and leitmotifs to stay accurate to the original series.

Trivia

  • Despite Cartoon Network Studios having involvement in the film, Warner Bros. Pictures didn’t distribute it.
  • The third Cartoon Network theatrical film, the first being The Powerpuff Girls Movie, and the second being Regular Show: The Movie.
  • Amblin Animation's first theatrical movie.
  • The first Cartoon Network film to be distributed outside of Warner Bros. Pictures.
  • The first Cartoon Network film to be produced in 2.35:1.

Rating

The Grim Adventures of Billy & Mandy received a PG rating (for crude content, some scary images and mild violence) by the Motion Picture Association.

Release

Universal Pictures schedules its release on July 3, 2026. It is released a day early in the United Kingdom on July 2. It had a world premiere in Hollywood on July 1.

Home media

The Grim Adventures of Billy & Mandy will be released on Digital HD on September 15, 2026 and on DVD and Blu-ray on October 20, by Universal Pictures Home Entertainment.

Reception

Critical reception

Rotten Tomatoes gives the film an approval rating of 70% based on the 140 reviews and an average rating of 6.5/10. The site's critical consensus reads: "The Grim Adventures of Billy & Mandy may seem like an unlikely attempt to return Cartoon Network's animated series to the big screen, but fans to the original show will adore its story as a long episode nonetheless." On Metacritic, it receives a score of 70 out of 100, based on 30 critics, indicating "generally favorable reviews". Audiences polled by CinemaScore gives the film an average grade of "A" on its A+ to F scale.

Box office

The Grim Adventures of Billy & Mandy grossed $95 million in North America, along with $100 million in other territories for a worldwide total of $195 million, making it a box office success.

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