Mia Farrow

Unicorn / Amalthea (voice)

Alan Arkin

Schmendrick (voice)

Tammy Grimes

Molly Grue (voice)

Jeff Bridges

Prince Lir (voice)

Christopher Lee

King Haggard (voice)

Angela Lansbury

Mommy Fortuna (voice)

Robert Klein

The Butterfly (voice)

Keenan Wynn

Captain Cully / Harpy (voice)

Paul Frees

Mabruk (voice)

René Auberjonois

The Skull (voice)

Theodore Gottlieb

Ruhk (voice)

Don Messick

The Cat (voice)

Ed Peck

Jack Jingley / Cully's Men (voice)

Gerry Beckley

The Balladeer (voice) (uncredited)

Dewey Bunnell

The 2nd Balladeer (voice) (uncredited)