Horton Hears a Who! (also known as Dr. Seuss' Horton Hears a Who! or simply Horton) is a 2008 American computer animated adventure comedy film based on the 1954 book of the same name by Dr. Seuss, produced by Blue Sky Studios and distributed by 20th Century Fox. Directed by Jimmy Hayward and Steve Martino in their directorial debuts, the film's screenplay was written by Cinco Paul and Ken Daurio, and features the voices of Jim Carrey and Steve Carell as Horton the Elephant and Mayor Ned McDodd, respectively, alongside Carol Burnett, Will Arnett, Seth Rogen, Dan Fogler, Isla Fisher, Jonah Hill, and Amy Poehler. Recurring Blue Sky collaborator John Powell composed the film's musical score. It is the fourth screen adaptation of the book following the 1970 Chuck Jones television special, the 1987 Soviet animated short, and the 1992 Russian animated short. The film was released theatrically on March 14, 2008 to generally positive reviews, and grossed $299 million on a budget of $85 million. Horton Hears a Who! was the third Dr. Seuss feature film adaptation, the first adaptation to be fully animated using CGI technology, the first adaptation to receive critical acclaim, and the second Dr. Seuss film starring Jim Carrey after How the Grinch Stole Christmas (2000). Plot In the Jungle of Nool, Horton the Elephant, the jungle’s eccentric teacher, hears a tiny yelp coming from a floating dust speck and gives chase to it before placing it on top of a pink flower. Horton finds out the speck harbors the city of Whoville and its inhabitants, the Whos, led by Mayor Ned McDodd, whose family includes his wife Sally, 96 daughters whose names all begin with the letter H, and one young son named JoJo. Despite being the oldest child and next in line for the mayoral position, JoJo does not want to be the next mayor, and he does not talk because he is so scared of disappointing his father. Once Horton begins carrying the speck with him, the city starts experiencing strange phenomena (earthquakes and changes in the weather), and the Mayor finds his attempts to caution Whoville challenged by the Town Council, led by the opportunistic yet condescending Chairman. After he makes contact with Horton, the Mayor finds out from local scientist Dr. Mary Lou LaRue that Whoville will be destroyed if Horton does not find a "safer, more stable home". With