Dr. Seuss' Horton Hears a Who! is a 2008 American computer-animated adventure comedy film based on the Dr. Seuss' book of the same name. The film was directed by Jimmy Hayward and Steve Martino, and was produced by Blue Sky Studios. It features the voices of Jim Carrey and Steve Carell. Released on March 14, 2008 by 20th Century Fox, it received generally positive reviews, and grossed $297 million on a budget of $85 million.