Reparto y equipo

Steve Martino

Jimmy Hayward

Jim Carrey Horton (voice)

Steve Carell Mayor (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 (voice)

Bob Gordon

Bruce Anderson

Patrick Worlock

John Powell

Tim Nordquist