Hans Conried
Narrator / Horton / Dr. H. Hoovey (voice)
Acting
June Foray
Jane Kangaroo / Mother Who / Baby Who / Cindy Lou Who (voice)
Acting
Chuck Jones
Junior Kangaroo / Various Whos / Quizmo McKwoff / JoJo (voice)
Directing
Thurl Ravenscroft
Wickersham Brother (voice) (uncredited)
Acting