Danny DeVito

The Lorax (voice)

Sherry Lynn

Additional Voices (voice)

Mickie McGowan

Additional Voices (voice)

Jack Angel

Additional Voices (voice)

Bob Bergen

Additional Voices (voice)

Debi Derryberry

Additional Voices (voice)

Danny Mann

Additional Voices (voice)

Fletcher Sheridan

Cy (voice)

John Cygan

Additional Voices (voice)

Bill Farmer

Additional Voices (voice)

Jess Harnell

Additional Voices (voice)

Mona Marshall

Additional Voices (voice)

Laraine Newman

Additional Voices (voice)

Jan Rabson

Additional Voices (voice)

Chris Renaud

Forest Animals (voice)

Stephen Tobolowsky

Uncle Ubb (voice)

Ed Helms

Once-ler (voice)

Zac Efron

Ted Wiggins (voice)

Rob Riggle

Mr. Aloysius O'Hare (voice)

Taylor Swift

Audrey (voice)