|The Grim Adventures of Billy & Mandy|
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
C. H. Greenblatt
Dee Bradley Baker
|Music by||Lorne Balfe|
|Edited by||Bobby Gibis|
|Production companies|| Amblin Entertainment (credit only)|
Cartoon Network Studios
|Distributed by||Universal Pictures|
|Release date||July 3, 2026|
|Running time||80 minutes|
|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.
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.
- Greg Eagles as Grim Reaper
- Richard Steven Horvitz as Billy/Harold
- Grey DeLisle as Mandy/Major Doctor Ghastly
- Vanessa Marshall as Irwin/Claire
- Armin Shimerman as General Skarr/Stomach
- Phil LaMarr as Hector Con Carne
- Frank Welker as Boskov
- C. H. Greenblatt as Fred Fredburger
- Jennifer Hale as Gladys
- Dee Bradley Baker as Phil
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.
The film's animation was done by Rough Draft Korea Co. Ltd. and Digital eMation.
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.
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.
- 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.
The Grim Adventures of Billy & Mandy received a PG rating (for crude content, some scary images and mild violence) by the Motion Picture Association.
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.
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.
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.
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.