The Cat in the Hat script, with Chris Meledandri as producer, and Audrey Geisel as the executive producer. However, the project never came to fruition. On January 24, 2018, it was announced that Warner Animation Group was in development of a different animated "Cat in the Hat" film as part of a creative partnership with Seuss Enterprises. In 2009, the Royal National Theatre created a stage version of the book, adapted and directed by Katie Mitchell. "Seussical", a musical adaptation that incorporates aspects of many Dr. Seuss works, features the Cat in the Hat as narrator. The musical received weak reviews when it opened, in
The Grinch Grinches the Cat in the Hat on December 2, 2011 until December 9, 2013. The Grinch wakes up in a good mood one morning until his reflection in the mirror prompts him to repeat the "Grinch's Oath" and prove himself a Grinch. Meanwhile, the Cat in the Hat goes on a picnic. Their paths cross when the Grinch can't get his car around the Cat's, and things quickly escalate into a fierce car chase after the Cat unintentionally insults the Grinch by calling him "Mr. Greenface." The Cat returns to the safety of his house, but the Grinch follows him there and tampers with his voice