Zac Efron character Ted Wiggins (voice)
Danny DeVito character The Lorax (voice)
Taylor Swift character Audrey (voice)
Ed Helms character Once-ler (voice)
Rob Riggle character Mr. Aloysius O'Hare (voice)
Jenny Slate character Mrs. Wiggins (voice)
Betty White character Grammy Norma (voice)
Willow Smith character Marta (voice)
Nasim Pedrad character Once-ler's Mom (voice)
Joel Swetow character 1st Marketing Guy (voice)
Michael Beattie character 2nd Marketing Guy (voice)
Dave B. Mitchell character 1st Commercial Guy (voice)
Dempsey Pappion character 2nd Commercial Guy (voice)
Elmarie Wendel character Aunt Grizelda (voice)
Danny Cooksey character Brett / Chet (voice)
Stephen Tobolowsky character Uncle Ubb (voice)
Chris Renaud character Forest Animals (voice)
Sherry Lynn character Additional Voices (voice)
Mickie McGowan character Additional Voices (voice)
Jack Angel character Additional Voices (voice)
Bob Bergen character Additional Voices (voice)
Debi Derryberry character Additional Voices (voice)
