Cast[]
- Homer Simpson (from The Simpsons) as Horton
- Charlie Brown as The Mayor of Who-Ville
- Lucy as Sally
- Snoopy as Jojo
- Pig-Pen as Morton
- Patty as Katie
- Merida (from Brave) as Mrs. Quillingan
- Zoe (from Alvin and the Chipmunks: Chipwrecked) as Kangaa
- Sideshow Bob (from The Simpsons) as Vlad
- Sally as Helen