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The Cat in the Hat is an upcoming American animated fantasy comedy film based on the 1957 children's book of the same name by Dr. Seuss. Produced by Warner Bros. Pictures Animation, Dr. Seuss Enterprises, and A Stern Talking To, the film is the second feature-length adaptation of the book following the 2003 live-action film. Written and directed by Alessandro Carloni and Erica Rivinoja (in the latter's feature directorial debut), it stars Bill Hader in the title role, alongside the voices of Xochitl Gomez, Matt Berry, Quinta Brunson, Paula Pell, Tiago Martinez, Giancarlo Esposito, America Ferrera, Bowen Yang, and Tituss Burgess.

An animated adaptation of The Cat in the Hat was originally announced by Illumination Entertainment in 2012, following the commercial success of The Lorax, with Rob Lieber set to write the script, but the film never came to fruition. Warner Bros. picked up the rights to the book in January 2018. Rivinoja and Art Hernandez were hired to direct in October 2020 before the latter was replaced by Carloni in June 2023. Most of the cast was announced in March 2024, with DNEG providing animation. Additional casting took place in June 2025.

The Cat in the Hat is scheduled to be theatrically released in the United States on November 6, 2026, by Warner Bros. Pictures.