the flower and proclaims he hears it, and the other animals of Nool notice that they hear it too. Despite his mother's objections, Rudy returns the flower to the released Horton, while the animals, realizing the truth about the Whos' existence, turn on the Kangaroo for deceiving them. While being praised for his integrity by his neighbors, Horton forgives the devastated and regretful Kangaroo, who befriends him with a makeshift umbrella for Whoville. The film ends with the Whos and the animals of Nool gathering to recite the chorus from "Can't Fight This Feeling" by REO Speedwagon, and it is revealed that the Jungle of Nool (and Earth as a whole) is just one speck, like Whoville, among numerous others, floating in space. Voice cast Jim Carrey as Horton the Elephant, a big-hearted, eccentric, goofy, naive, and outgoing elephant and teacher in the Jungle of Nool who possesses acute hearing abilities. Steve Carell as Mayor Ned McDodd, the eccentric and fun-loving mayor of Whoville who has 96 daughters, 1 son named JoJo and a wife named Sally. Carol Burnett as Sour Kangaroo, an egomaniacal kangaroo who mistrusts Horton's inquisitive nature as a threat to her legal authority over Nool. Will Arnett as Vlad Vladikoff, a scary, savage and murderous yet goofy, eccentric and idiotic vulture with a Russian accent hired by the Sour Kangaroo to steal Horton's flower. Seth Rogen as Morton, a mouse and Horton's best friend in the Jungle of Nool who does not believe his story, but still helps him. Dan Fogler as The Chairman, the lead Whoville councilman who is dedicated to traditions and mistrustful of Mayor McDodd. Fogler also voices Yummo Wickersham, the largest and oldest of the Wickersham apes and the leader and older brother of the Wickershams. Isla Fisher as Dr. Mary Lou LaRue, a professor, scientist and inventor at Who U. Jonah Hill as Tommy, a fat orange bear cub and one of Horton's students. Amy Poehler as Sally O'Malley-McDodd, Mayor McDodd's wife and mother to Jojo and her 96 daughters. Jaime Pressly as Mrs. Quilligan, a Russian Palooski and Jessica's mother. Jesse McCartney as JoJo McDodd, Mayor McDodd's quiet eldest son who does not want to be the next mayor. Fletcher Sheridan provides JoJo's singing voice in the film's final song. Selena Gomez as Helga McDodd, one of the mayor's daughters. Josh Flitter as Rudy Kangaroo, Sour Kangaroo's doubtful son who