| Photos (see all 38 | slideshow) | Videos (see all 3 videos ) |
| Jim Carrey | ... | Horton (voice) | |
| Steve Carell | ... | The Mayor of Whoville (voice) | |
| Carol Burnett | ... | Kangaroo (voice) | |
| Will Arnett | ... | Vlad (voice) | |
| Seth Rogen | ... | Morton (voice) | |
| Dan Fogler | ... | Councilman / Yummo Wickersham (voice) | |
| Isla Fisher | ... | Dr. Mary Lou Larue (voice) | |
| Jonah Hill | ... | Tommy (voice) | |
| Amy Poehler | ... | Sally O'Malley (voice) | |
| Jaime Pressly | ... | Mrs. Quilligan (voice) | |
| Charles Osgood | ... | Narrator (voice) | |
| Josh Flitter | ... | Rudy (voice) | |
| Niecy Nash | ... | Miss Yelp (voice) | |
| Jesse McCartney | ... | JoJo (voice) | |
| Shelby Adamowsky | ... | Hedy / Hooly / Additional Voices (voice) | |
| Jack Angel | ... | Old Time Who / Additional Voices (voice) | |
| Caitlin Rose Anderson | ... | Helen (voice) | |
| Emily Anderson | ... | Heather (voice) | |
| Jan Rabson | ... | Town Cryer / Additional Voices (voice) | |
| John Cygan | ... | Who / Additional Voices (voice) | |
| Jess Harnell | ... | Another Who / Additional Voices (voice) | |
| Debi Derryberry | ... | Who Mom / Additional Voices (voice) | |
| Samantha Droke | ... | Hildy / Holly (voice) | |
| Karen Disher | ... | Who Kid (voice) | |
| Marshall Efron | ... | Wickersham Guard #1 (voice) | |
| Bill Farmer | ... | Willie Bear / Additional Voices (voice) | |
| Jason Fricchione | ... | Joe (voice) | |
| Heather Goldenhersh | ... | Who Girl / Additional Voices (voice) | |
| Selena Gomez | ... | Helga (voice) | |
| Jimmy Hayward | ... | Obnoxious Who (voice) | |
| Joey King | ... | Katie (voice) | |
| Christina Martino | ... | Heidi / Haley (voice) | |
| Ellie Martino | ... | Hanna / Additional Voices (voice) | |
| Laraine Newman | ... | Glummox Mom / Additional Voices (voice) | |
| Tim Nordquist | ... | Wickersham Guard #2 (voice) | |
| Colleen O'Shaughnessey | ... | Angela / Additional Voices (voice) | |
| Laura Ortiz | ... | Jessica (voice) | |
| Joe Pasquale | ... | The Dentist (voice) | |
| Isabella Acres | ... | Additional Voices (voice) | |
| Mona Marshall | ... | Additional Voices (voice) | |
| Connor Anderson | ... | Additional Voices (voice) | |
| Mickie McGowan | ... | Additional Voices (voice) | |
| Bob Bergen | ... | Additional Voices (voice) | |
| Madison Pettis | ... | Additional Voices (voice) | |
| Madison Davenport | ... | Additional Voices (voice) | |
| Grace Rolek | ... | Additional Voices (voice) | |
| Jennessa Rose | ... | Additional Voices (voice) | |
| Teresa Ganzel | ... | Additional Voices (voice) | |
| Ariel Winter | ... | Additional Voices (voice) | |
| Danny Mann | ... | Additional Voices (voice) |
Directed by | |||
| Jimmy Hayward | |||
| Steve Martino | |||
Writing credits(in alphabetical order) | ||
| Ken Daurio | screenplay | |
| Cinco Paul | screenplay | |
| Dr. Seuss | book | |
| Dr. Seuss | story | |
Produced by | |||
| Audrey Geisel | .... | executive producer | |
| Bob Gordon | .... | producer | |
| Christopher Meledandri | .... | executive producer | |
| Chris Wedge | .... | executive producer | |
Original Music by | |||
| John Powell | |||
Film Editing by | |||
| Tim Nordquist | |||
Art Direction by | |||
| Thomas Cardone | |||
Art Department | |||
| Jeff Biancalana | .... | storyboard artist | |
| Jony Chandra | .... | storyboard artist | |
| Chris Gilligan | .... | additional storyboard artist | |
| Tony Maki | .... | storyboard artist | |
| Vicki Saulls | .... | sculptor | |
Sound Department | |||
| Kevin Bailey | .... | assistant sound effects editor (as Kevin N. Bailey) | |
| Jeremy Bowker | .... | foley editor | |
| Derek Casari | .... | adr engineer | |
| Dustin Cawood | .... | assistant sound designer | |
| Brian Chumney | .... | assistant adr editor | |
| Frank Clary | .... | foley recordist | |
| Colette Dahanne | .... | sound effects editor | |
| Coya Elliott | .... | assistant supervising sound editor | |
| Sean England | .... | foley mixer | |
| Sue Fox | .... | foley editor | |
| Andrea S. Gard | .... | foley editor | |
| Jessica Lemes da Silva | .... | sound effects recordist | |
| Dennis Leonard | .... | supervising sound editor | |
| Zach Martin | .... | sound mix technician | |
| Jonathan Null | .... | adr supervisor | |
| Gary Rizzo | .... | sound re-recording mixer | |
| Clint Smith | .... | sound recordist | |
| Mac Smith | .... | sound effects editor | |
| Carlos Sotolongo | .... | original dialogue mixer | |
| Randy Thom | .... | sound designer | |
| Randy Thom | .... | supervising mixer | |
Visual Effects by | |||
| Inna Agujen | .... | assembly technical director | |
| Lynn Bacino | .... | senior technical director: lighting | |
| Jinyi Baird | .... | production coordinator: effects | |
| Mark Bajuk | .... | fur technical director | |
| David Barksdale | .... | effects technical director | |
| David Barksdale | .... | fur technical director | |
| Andrew Beddini | .... | lighting development supervisor | |
| Heather Brown | .... | lighting technical assistant | |
| Marco Burbano | .... | character technical director | |
| Ian D. Butterfield | .... | senior materials technical director | |
| Jon Campbell | .... | effects technical director | |
| Jon Campbell | .... | fur technical director | |
| Dan Cayer | .... | senior lighting/compositing: Blue Sky Studios | |
| Jane Chatot | .... | character TA | |
| Sheng-Fang Chen | .... | lighting technical director | |
| Eldar Cholich | .... | digital compositor | |
| Eldar Cholich | .... | senior technical director: lighting | |
| Sheldon Chow | .... | lead technical director: fur | |
| Rhett Collier | .... | senior effects technical director | |
| Brendan Condit | .... | character technical director | |
| Shaun Cusick | .... | senior modeler | |
| Casey Dame | .... | character technical director | |
| Jason Davies | .... | character technical director | |
| Jonathan Davis | .... | lighting technical director | |
| Diana Diriwaechter | .... | materials technical director | |
| Mark Edwards | .... | character technical director | |
| Jud Estes | .... | Shake compositor | |
| Jud Estes | .... | digital paint | |
| Ian Etra | .... | character technical director | |
| Tamara Garabedian | .... | fur technical director | |
| Kirk Garfield | .... | visual effects supervisor | |
| Eric Grimenstein | .... | fur technical director | |
| James Gu | .... | character technical director | |
| Brian A. Hill | .... | materials technical director | |
| Todd Edward James Hill | .... | character technical director | |
| Brien Hindman | .... | senior modeler | |
| Isaac Holze | .... | assembly technical assistant | |
| Nickie Huai | .... | digital compositor | |
| Nickie Huai | .... | lighting techical director | |
| Youngwoong Jang | .... | lighting technical director | |
| Jina Kang | .... | technical director | |
| Ben Kilgore | .... | character technical director | |
| Jamie Kirschenbaum | .... | senior effects technical director | |
| Alexander Levenson | .... | senior modeler | |
| Yu-Li Liao | .... | character technical director | |
| Robin Luera | .... | animator (as WildOrca) | |
| Erik Malvarez | .... | senior character technical director | |
| Melanie Martini | .... | set dresser | |
| David V. Mei | .... | modeling supervisor | |
| Salvatore Melluso | .... | environmental lead modeler | |
| Karyn Monschein | .... | layout | |
| Christopher Moore | .... | materials technical director | |
| Cosku Ozdemir | .... | materials technical director: Blue Sky Studios | |
| Sean Palmer | .... | effects technical director | |
| James Parente | .... | assembly technical director | |
| James Parente | .... | effects technical director | |
| Elvira Pinkhas | .... | effects technical director | |
| Stewart Pomeroy | .... | digital artist | |
| Gabriel Portnof | .... | lighting technical director | |
| Arun Ram-Mohan | .... | lighting technical director | |
| Tridip Ray | .... | assembly technical assistant | |
| Tridip Ray | .... | lighting technical assistant | |
| Jacob Richards | .... | lighting technical director | |
| Gregory Rizzi | .... | animator | |
| Matt Roach | .... | effects technical director | |
| Edward Robbins | .... | modeler | |
| Gates Roberg-Clark | .... | lighting technical assistant | |
| Aaron M. Ross | .... | feather development | |
| Aaron M. Ross | .... | fur technical director | |
| Aaron M. Ross | .... | senior technical director: lighting | |
| Ari Rubenstein | .... | digital compositor: Blue Sky Studios | |
| Jessica Sances | .... | character animator | |
| Jessica Sances | .... | character lead | |
| Monika Sawyer | .... | fur technical director | |
| Andrew Schneider | .... | effects technical director | |
| Jon Schroth | .... | lighting technical director | |
| Scott Sharp | .... | senior character technical director | |
| Daniel Ken Shimmyo | .... | materials technical director | |
| John Siczewicz | .... | lead digital paint artist | |
| Keith Stichweh | .... | technical director | |
| Dave Strick | .... | modeler | |
| Prapanch Swamy | .... | additional effects | |
| Prapanch Swamy | .... | fur technical director | |
| Dann Tarmy | .... | digital compositor | |
| Dann Tarmy | .... | lighting technical director | |
| Gary Telfer | .... | final layout artist | |
| Gary Telfer | .... | previs modeler | |
| Radhika Thirunarayanan | .... | materials technical director | |
| John David Thornton | .... | senior animator | |
| Paul-Jozef Torrevillas | .... | lighting technical assistant | |
| Ellen Trinh | .... | lighting technical director | |
| Stephen Unterfranz | .... | supervising character technical director | |
| Antelmo Villarreal | .... | assembly TA | |
| Aaron Walsman | .... | character technical director | |
| Danny Williams | .... | character modeling lead | |
| James Willingham III | .... | previs artist | |
| Brent Wong | .... | lighting technical director | |
| Brent Wong | .... | modeler | |
| Jerril Yoo | .... | senior character technical director | |
| Terry Ziegelman | .... | fur technical director | |
| Terry Ziegelman | .... | lighting technical director | |
| Luis Pages | .... | character technical director (uncredited) | |
Animation Department | |||
| Jeff Biancalana | .... | animator | |
| Aja Bogdanoff | .... | animator | |
| Robert Cardone | .... | layout supervisor | |
| Heather Carpini | .... | animator | |
| Scott Carroll | .... | animator | |
| Jerod Chirico | .... | lead character animator | |
| Ricardo Curtis | .... | head of story | |
| Jason Davies | .... | technical director: character technical | |
| Rylan Davies | .... | animator | |
| Pete Devlin | .... | animator | |
| Aaron Dimunno | .... | layout artist | |
| Karen Disher | .... | story artist | |
| Nathan Engelhardt | .... | animator | |
| Scott Farrell | .... | animator | |
| Gordana Fersini | .... | animator | |
| Edmund Fong | .... | story artist | |
| Michael Galbraith | .... | animator | |
| Nick Gibbons | .... | assistant animator | |
| Curran W. Giddens | .... | animator | |
| Mark Curnell Harris | .... | animation character lead: The Whos | |
| Aaron J. Hartline | .... | supervising animator | |
| Ryan Hobbiebrunken | .... | animator | |
| Bill Hodman | .... | workbook | |
| Robert Huth | .... | animation technical assistant | |
| Leif Jeffers | .... | animator | |
| Jeff Kim | .... | animator | |
| Ken Lee | .... | workbook layout artist | |
| Moonsung Lee | .... | animator | |
| Andrew H. Leung | .... | lead animatic artist | |
| Alex Li | .... | workbook layout artist | |
| Lluis Llobera | .... | animator | |
| Eric Luhta | .... | animator | |
| Venece Lyman | .... | animation technical assistant | |
| Wesley Mandell | .... | animator | |
| Adam McMahon | .... | modeler | |
| Jacob Patrick | .... | animator | |
| David S. Peng | .... | animation character lead: Horton | |
| Rebecca Perez | .... | animator | |
| Gareth Porter | .... | lead technical director: assembly | |
| Amila Puhala | .... | animator | |
| Patrik Puhala | .... | animator | |
| Chris Renaud | .... | story artist | |
| Raymond Ross | .... | animator | |
| Derek Rozmes | .... | animator | |
| Jessica Sances | .... | character animator | |
| Jessica Sances | .... | character lead: Sally & Miss Yelp | |
| Tom Saville | .... | character animator | |
| Matthew D. Simmons | .... | animation technical lead | |
| Mike Thurmeier | .... | senior supervising animator | |
| Nikki Tomaino | .... | technical director: materials | |
| David Torres | .... | lead animator: "Horton" | |
| Michael C. Walling | .... | character animator | |
| Steve Warbrick | .... | animatic artist | |
| Royce Wesley | .... | animator | |
| Rafael Zentil | .... | story artist | |
Casting Department | |||
| Micah Dahlberg | .... | casting associate | |
Editorial Department | |||
| Kent Beyda | .... | editorial consultant | |
| Erin Crackel | .... | second assistant editor | |
| Eileen Godoy | .... | digital intermediate producer: EFilm | |
| Kathy Graves | .... | assistant editor | |
| Matt Hull | .... | assistant digital intermediate producer | |
| James Palumbo | .... | development editor: Blue Sky Studios | |
| Jim Passon | .... | color timer | |
| Chad N. Walker | .... | apprentice editor (as Chad Walker) | |
| Christopher Campbell | .... | first assistant editor (uncredited) | |
| Jason Fricchione | .... | editorial manager (uncredited) | |
| Randy Trager | .... | associate editor (uncredited) | |
Music Department | |||
| Pete Anthony | .... | conductor | |
| Pete Anthony | .... | orchestrator | |
| Thomas A. Carlson | .... | supervising music editor | |
| Jane Antonia Cornish | .... | orchestrator | |
| Brad Dechter | .... | orchestrator | |
| Germaine Franco | .... | score production coordinator | |
| Rick Giovinazzo | .... | orchestrator | |
| Randy Kerber | .... | orchestrator | |
| Andrew Kinney | .... | orchestrator | |
| Kevin Kliesch | .... | orchestrator | |
| James McKee Smith | .... | composer: additional music | |
| James McKee Smith | .... | music programmer | |
| Dave Metzger | .... | orchestrator | |
| Shawn Murphy | .... | scoring mixer | |
| Conrad Pope | .... | orchestrator | |
| John Ashton Thomas | .... | composer: additional music | |
| John Ashton Thomas | .... | music programmer | |
| John Ashton Thomas | .... | orchestrator | |
| Gina Zimmitti | .... | music contractor | |
Other crew | |||
| Tansal Arnas | .... | additional production supporter | |
| Jinyi Baird | .... | production coordinator: effects | |
| Jennifer Brola | .... | research associate | |
| Kim Chase | .... | operations: Blue Sky Studios | |
| Brian Grimenstein | .... | scheduling coordinator | |
| Brett Hoffman | .... | script supervisor | |
| Christopher Kappler | .... | hr coordinator | |
| Dave LaMattina | .... | assistant to directors | |
| Matthew Morgenthaler | .... | production intern | |
| Paul Ohrt | .... | production executive | |
| Mike Reiss | .... | story consultant | |
| Chris Siemasko | .... | additional production support | |
| Jon Vitti | .... | story consultant | |
| Weera Tom Wichitsripornkul | .... | technical director | |
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I'm telling the truth...i thought this movie would be a stinker from the teaser trailer and TV spots but this surprised me as well as every other person at the screening. It even surprised the film operator! Anyway, the great voice cast voiced by some great actors, Jim Carrey and Steve Carrell and even Seth Rogen(which is a nice change for him, from all his dirty cursing roles(don't get me wrong,i love him in those roles)). Dane Cook was a little annoying, but it wont really distract you from the big picture. In this film, Steve Carrell is the Mayor of Who-Ville, a town on a dandelion full of tiny people. Jim Carrey plays Horton...who is a elephant who finds a dandelion, picks it and figures out he must protect it because of Who-ville. Seth Rogen plays a rat like creature in his role. A supporting cast with Amy Poehler, Jonah Hill, Dan Fogler and much more. This film is great for little kids and a surprising delight for adults.