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)
Stephen Tobolowsky
Uncle Ubb (voice)
Chris Renaud
Forest Animals (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)
Claira Nicole Titman
Additional Voices (voice)
Jim Ward
Additional Voices (voice)
Carter Goodrich
Character Designer
Chris Renaud
Director
Janet Healey
Producer
Mitja Rabar
Animation
Audrey Geisel
Executive Producer
Steven Liu
Editor
John Powell
Original Music Composer
Cinco Paul
Executive Producer
Claire Dodgson
Editor
Ken Schretzmann
Editor
Massimo Ruberto
Music Supervisor
Yarrow Cheney
Production Design
Ken Daurio
Executive Producer
Fabrice Joubert
Animation
Gary Rizzo
Sound Re-Recording Mixer
Randy Thom
Sound Re-Recording Mixer
Randy Thom
Supervising Sound Editor
John Powell
Songs
Cinco Paul
Songs
Chris Meledandri
Producer
Randy Thom
Sound Designer
Kyle Balda
Co-Director
Dennis Leonard
Supervising Sound Editor
Dr. Seuss
Book
Eric Guillon
Character Designer
Ken Daurio
Screenplay
Cinco Paul
Screenplay
Catherine Catie Lee
Lighting Artist
Daniel Laurie
ADR Supervisor
Daniel Laurie
Dialogue Editor
Julie Minasian
Vocals
Robert Taylor
Associate Producer
Mike Reiss
Story Consultant
Dave Rosenbaum
Story Supervisor