Billy & Mandy

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 Entertainment and Cartoon Network Studios and distributed by Universal Pictures1. It was the first animated feature film from Amblin, since 2011's The Adventures of Tintin.

Greg Eagles, Richard Steven Horvitz, Grey Griffin, 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 traveling 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.

Premise
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 is 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

 * Greg Eagles as Grim Reaper
 * Richard Steven Horvitz as Billy/Harold
 * Grey Griffin 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

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 Animation’s Home by Tim Johnson, composes the film’s score. Balfe was tasked to capture the music and leitmotifs to stay accurate to the original series.

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. This is also the first Cartoon Network Studios film to be produced in a 2.35:1 format.

Home media
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.

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: "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.