An ensemble cast of Peyton Elizabeth Lee, Jacob Tremblay, Carey Mulligan, Mahershala Ali, Awkwafina, Angela Bassett, Jake Johnson, Charlie Day, Amandla Stenberg, Jemaine Clement, Maya Erskine, Tantoo Cardinal, Tom Waits, and Richard E. Grant bring their vocal talents to the roles.

Development began in September 2011, weeks after the release of the novel, when Laika announced plans to adapt Wildwood as a stop-motion animated feature film.

[3][4][5] In August 2022, Carey Mulligan, Mahershala Ali, Peyton Elizabeth Lee, Jacob Tremblay, Awkwafina, Angela Bassett, Jake Johnson, Charlie Day, Amandla Stenberg, Jemaine Clement, Maya Erskine, Tantoo Cardinal, Tom Waits, and Richard E. Grant were all announced as part of the ensemble voice cast of the film.

[9] Production of the stop-motion animated feature took place at Laika's facility studio outside in Portland, Oregon, the first film set in its hometown.

[6] In 2024, Knight revealed the project was the most ambitious film that Laika had ever made: "We've had to build up the creative tools, the technology and our storytelling muscles to do this book justice."