Watch The Cat in the Hat (2026) : Full Movie Online Free Doing what he does best, the Cat spreads joy to kids in his hilarious, signature, and singularly irreverent way, transporting them and audiences on a fantastical journey through a world they've never seen before. Our hero takes on his toughest assignment yet for the I.I.I.I. (Institute for the Institution of Imagination and Inspiration, LLC) to cheer up Gabby and Sebastian, a pair of siblings struggling to move to a new town. Known for taking things too far, this could be this agent of chaos' last chance to prove himself...or lose his magical hat!