Jack Warden

as Rocco (voice)

Ray Hubley

as Adam (voice)

Maureen Stapleton

as Mother (voice)

Morris Carnovsky

as Earl of Limestone (voice)

Phil Leeds

as Pre-Cambrian Rocks (voice)

Harry Edison

as Uncle Igneous (voice)

Don Elliott

as Aunt Sedimentary (voice)

Ruth Price

as Cousin Metamorphic (voice)