Detailinformatie over de film Horton Hears a Who!

Dan Fogler (Councilman / Yummo Wickersham), Samantha Droke (Hildy / Holly (as Samantha Raye Droke)), Jason Fricchione (Joe), Laura Ortiz (Jessica), Jaime Pressly (Mrs. Quilligan), Jan Rabson (Town Cryer / Additional Voices), Grace Rolek (Additional Voices), Amy Poehler (Sally O'Malley), Jennessa Rose (Additional Voices), Niecy Nash (Miss Yelp), Madison Pettis (Additional Voices), Marshall Efron (Wickersham Guard 1), Josh Flitter (Rudy), Ariel Winter (Additional Voices), Heather Goldenhersh (Who Girl / Additional Voices), Isabella Acres (Additional Voices), Jesse McCartney (JoJo), Laraine Newman (Glummox Mom / Additional Voices), Bob Bergen (Additional Voices), Teresa Ganzel (Additional Voices), Sherry Lynn (Additional Voice), Bill Farmer (Willie Bear / Additional Voices), Mickie McGowan (Additional Voices), Debi Derryberry (Who Mom / Additional Voices), Emily Anderson (Heather), Connor Anderson (Who Child #1), Jeff Biancalana (Additional Voices), John Cygan (Who / Additional Voices), Karen Disher (Who Kid), Kathy Graves Toon (Additional Voice), Jess Harnell (Another Who / Additional Voices), Jimmy Hayward (Obnoxious Who), Danny Mann (Additional Voices), Mona Marshall (Additional Voices), Christina Martino (Heidi / Haley), Ellie Martino (Hanna / Additional Voices), Tim Nordquist (Wickersham Guard 2), Colleen O'Shaughnessey (Angela / Additional Voices), Charles Osgood (Narrator), Joe Pasquale (The Dentist), Caitlin Rose Anderson (Helen)

Ken Daurio, Cinco Paul, Dr. Seuss, Jeff Siergey

Gary A. Rizzo, Colette D. Dahanne, Coya Elliott, Sue Fox, Ellen Heuer, Pete Horner, Dennis Leonard, Kyrsten Mate Comoglio, Mac Smith, Randy Thom

Bruce Anderson, Bob Gordon

20th Century Fox, 20th Century Fox de Argentina, 20th Century Fox Netherlands, 20th Century Fox of Germany, Blue Sky Studios, CLMC Multimedia, Fox-Warner, Twentieth Century Fox Animation, Twentieth Century Fox Film Corporation