Narrator
Eddie Albert
The Lorax / The Once-ler (voice)
Bob Holt
Miss O'Schmunsler (voice)
Athena Lorde
Boy (voice)
Harlen Carraher
Singer
Scatman Crothers
Vivian Vance
Thurl Ravenscroft
Producer
Friz Freleng
Director
Hawley Pratt
David H. DePatie
Storyboard Artist
Chuck Jones
Dr. Seuss
Writer
Irv Spector
Music
Dean Elliott