Danny DeVito
The Lorax (voice)
Ed Helms
Once-ler (voice)
Zac Efron
Ted Wiggins (voice)
Rob Riggle
Mr. Aloysius O'Hare (voice)
Taylor Swift
Audrey (voice)
Jenny Slate
Mrs. Wiggins (voice)
Betty White
Grammy Norma (voice)
Nasim Pedrad
Once-ler's Mom (voice)
Joel Swetow
1st Marketing Guy (voice)
Michael Beattie
2nd Marketing Guy (voice)
Elmarie Wendel
Aunt Grizelda (voice)
Dave B. Mitchell
1st Commercial Guy (voice)
Dempsey Pappion
2nd Commercial Guy (voice)
Danny Cooksey
Brett / Chet (voice)
