Milo
Butch Patrick
Officer Short Shrift / Dodecahedron / Demon of Insincerity (voice)
Mel Blanc
Humbug (voice)
Les Tremayne
Whether Man / Senses Taker / Terrible Trivium / Gelatinous Giant (voice)
Daws Butler
Awful DYNN (voice)
Candy Candido
King Azaz / The MathemaGician (voice)
Hans Conried
Ralph / Faintly Macabre / Princess of Pure Reason (voice)
June Foray
Princess of Sweet Rhyme (voice)
Patti Gilbert
Spelling Bee / Chroma (voice)
Shepard Menken
akofonous A. Dischord / Tollbooth Speaker (voice)
Cliff Norton
Tock The Watchdog (voice)
Larry Thor
Director
Dave Monahan
Makeup Artist
William Tuttle
Producer
Chuck Jones
Screenplay
Abe Levitow
Editor
William Faris
Art Direction
George W. Davis
Music
Dean Elliott
Set Decoration
Charles Pierce
Les Goldman
Charles K. Hagedon
Henry Grace
Music Arranger
Lee Pockriss
Director of Photography
Lester Shorr
Production Design
Maurice Noble
Book
Norton Juster
Sam Rosen