Will Ferrell

Ted (Man with the Yellow Hat) (voice)

Drew Barrymore

Maggie (voice)

David Cross

Junior (voice)

Eugene Levy

Clovis (voice)

Joan Plowright

Ms. Plushbottom (voice)

Dick Van Dyke

Mr. Bloomsberry (voice)

Frank Welker

George (voice)

Ed O'Ross

Ivan (voice)

Billy West

Manager (voice)

Jeff Bennett

Salesman (voice)

Kath Soucie

Animal Control Receptionist (voice)

Clint Howard

Balloon Man (voice)

Alexander Gould

Kid (voice)

Ariel Winter

Kid (voice)

Kimberly Brooks

Additional Voices (voice)

Fred Tatasciore

Additional Voices (voice)