 | Alan Arkin als Schmendrick (voice) |
 | Jeff Bridges als Prince Lir (voice) |
 | Mia Farrow als Unicorn / Amalthea (voice) |
 | Tammy Grimes als Molly Grue (voice) |
 | Robert Klein als The Butterfly (voice) |
 | Angela Lansbury als Mommy Fortuna (voice) |
 | Christopher Lee als King Haggard (voice) |
 | Keenan Wynn als Captain Cully / Harpy (voice) |
 | Paul Frees als Mabruk (voice) |
 | René Auberjonois als The Skull (voice) |
 | Theodore Gottlieb als Ruhk (voice) |
 | Don Messick als The Cat (voice) |
 | Jack Lester als Hunter #1 / Old Farmer / Cully's Men (voice) |
| Nellie Bellflower als The Tree (voice) |
 | Ed Peck als Jack Jingley / Cully's Men (voice) |
| Ken Jennings als Hunter #2 / Cully's Men |
 | Gerry Beckley als The Balladeer (voice) (uncredited) |
 | Dewey Bunnell als The 2nd Balladeer (voice) (uncredited) |
| Brad Palmer als The Balladeers' Bassist / Chorus (voice) (uncredited) |
| Jules Bass | Director |
| Arthur Rankin, Jr. | Producer |
| Arthur Rankin, Jr. | Director |
| Jules Bass | Producer |
| Tomoko Kida | Editor |
| Peter S. Beagle | Author |
| Peter S. Beagle | Screenplay |
| Jimmy Webb | Original Music Composer |
| Kayoko Sakano | Animation |
| Fukuo Suzuki | Animation |
| Don Duga | Storyboard |
| Elton Moser | Orchestrator |
| Kiyoshi Sakai | Animation Coordinator |
| Mitsuo Iwasaki | Background Designer |
| Arthur Rankin, Jr. | Production Design |
| Donald O. Mitchell | Sound Mixer |
| Michael Chase Walker | Associate Producer |
| Masahiro Yoshida | Animation |
| Tooru Hara | Animation Coordinator |
| Dewey Bunnell | Songs |
| John Curcio | Sound Engineer |
| John Richards | Sound Engineer |
| Katsuhisa Yamada | Continuity |
| Noriyoshi Ohira | Sound Effects |
| Tom Clack | Sound Effects |
| Yoshiko Sasaki | Animation |
| Hidemi Kubo | Key Animation |
| Dave Iveland | Sound Engineer |
| Martin Starger | Executive Producer |
| Tadakatsu Yoshida | Key Animation |
| William McCauley | Orchestrator |
| Hiroyasu Omoto | Camera Operator |
| Kazuyuki Kobayashi | Key Animation |
| Lester Abrams | Character Designer |
| Irra Duga | Art Designer |
| Kazusuke Yoshihara | Background Designer |
| Minoru Nishida | Background Designer |
| Lee Dannacher | Production Coordinator |
| Tsuguyuki Kubo | Continuity |
| Matthew McCauley | Orchestrator |
| Michael Pakleppa | Production Director |
| Masaki Îzuka | Executive In Charge Of Production |
