Horton Hears a Who! - Cast

Jim Carrey

Horton (voice)
Actor

Steve Carell

Mayor (voice)
Actor

Carol Burnett

Kangaroo (voice)
Actor

Will Arnett

Vlad (voice)
Actor

Seth Rogen

Morton (voice)
Actor

Dan Fogler

Councilman / Yummo Wickersham (voice)
Actor

Isla Fisher

Dr. Mary Lou Larue (voice)
Actor

Jonah Hill

Tommy (voice)
Actor

Amy Poehler

Sally O'Malley (voice)
Actor

Jaime Pressly

Mrs. Quilligan (voice)
Actor

Charles Osgood

Narrator (voice)
Actor

Josh Flitter

Rudy (voice)
Actor

Niecy Nash-Betts

Miss Yelp (voice)
Actor

Jesse McCartney

JoJo (voice)
Actor

Jack Angel

Old Time Who (voice)
Actor

Jan Rabson

Town Cryer (voice)
Actor

John Cygan

Who (voice)
Actor

Jess Harnell

Another Who (voice)
Actor

Debi Derryberry

Who Mom (voice)
Actor

Samantha Droke

Hildy / Holly (voice)
Actor

Karen Disher

Who Kid (voice)
Actor

Marshall Efron

Wickersham Guard 1 (voice)
Actor

Bill Farmer

Willie Bear (voice)
Actor

Jason Fricchione

Joe (voice)
Actor

Heather Goldenhersh

Who Girl (voice)
Actor

Selena Gomez

Helga (voice)
Actor

Jimmy Hayward

Obnoxious Who (voice)
Actor

Joey King

Katie (voice)
Actor

Laraine Newman

Glummox Mom (voice)
Actor

Tim Nordquist

Wickersham Guard 2 (voice)
Actor

Colleen O'Shaughnessey

Angela (voice)
Actor

Laura Ortiz

Jessica (voice)
Actor

Joe Pasquale

The Dentist (voice)
Actor

Isabella Acres

Additional Voices (voice)
Actor

Bob Bergen

Additional Voices (voice)
Actor

Madison Davenport

Additional Voices (voice)
Actor

Teresa Ganzel

Additional Voices (voice)
Actor

Sherry Lynn

Additional Voices (voice)
Actor

Danny Mann

Additional Voices (voice)
Actor

Mona Marshall

Additional Voices (voice)
Actor

Mickie McGowan

Additional Voices (voice)
Actor

Madison Pettis

Additional Voices (voice)
Actor

Grace Rolek

Additional Voices (voice)
Actor

Ariel Winter

Additional Voices (voice)
Actor

Fletcher Sheridan

Jojo (singing voice) (uncredited)
Actor