Jules Bass Director, Original Music Paul O'Keefe Chris Actor Jack Gilford Papa Andersen Actor Ray Bolger The Pieman Actor Margaret Hamilton Mrs. Klopplebobbler Actor Tallulah Bankhead The Sea Witch Voice Victor Borge Zenith Voice Patty Duke Thumbelina Voice Sessue Hayakawa The Mole Voice Burl Ives Father Neptune Voice Boris Karloff The Rat Voice Hayley Mills The Little Mermaid Voice Cyril Ritchard The Sandman Voice Terry-Thomas Brig. Zachary Zilch Voice Ed Wynn The Emperor Voice Billie Mae Richards Voice Larry D. Mann Voice Arthur Rankin Jr. Screenwriter, Producer Romeo Muller Writer Joseph E. Levine Executive Producer Larry Roemer Associate Producer Maury Laws Original Music Daniel Cavelli Cinematographer Tadahito Mochinaga Cinematographer Maurice Gordon Art Director Kizo Nagashima Assistant Director