Horton Hears a Who! is a 2008 American animated adventure comedy film based on the 1954 children's book by Dr. Seuss. Produced by Blue Sky Studios, the film was directed by Jimmy Hayward and Steve Martino and written by Cinco Paul and Ken Daurio. It stars 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. The plot follows Horton, an eccentric elephant who discovers the city of Whoville, led by Mayor McDodd, on a tiny speck. Horton begins a journey to take the speck to safety while a group of animals led by the Kangaroo attempt to stop him.

Plot

In the Jungle of Nool, Horton the Elephant, the jungle's eccentric nature teacher, hears a tiny yelp coming from a floating dust speck and gives chase to it before placing it on top of a pink clover. 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 teenage 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 speak due to his fear of disappointing his father.