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The Cat in the Hat is a 2026 American animated fantasy comedy film loosely based on the 1957 children's book by Dr. Seuss. Written and directed by Alessandro Carloni and Erica Rivinoja, it is the second feature-length adaptation of the book following the 2003 live-action film. Bill Hader stars as the voice of the titular character, alongside 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.