When a kindly elephant hears a faint cry of help from a floating speck of dust, his attempts to protect the tiny particle cause his neighbors to question his sanity in this animated adaptation of Dr. Seuss' classic 1954 children's book of the same name. Produced by Ice Age makers Blue Sky, scripted by Cinco Paul and Ken Daurio, and directed by Jimmy Hayward and Steve Martino, Horton Hears a Who reunites Bruce Almighty co-stars Jim Carrey and Steve Carell as the eponymous elephant and the mayor of Whoville respectively.