Dave Goelz

as Gonzo / Dr. Bunsen Honeydew / Waldorf / The Birdman (voice)

Gonzo / Dr. Bunsen Honeydew / Waldorf / The Birdman (voice)

Steve Whitmire

as Kermit the Frog / Rizzo the Rat / Beaker / Cosmic Fish #1 / Rainbow / Miss Piggy (assistant) (voice)

Kermit the Frog / Rizzo the Rat / Beaker / Cosmic Fish #1 / Rainbow / Miss Piggy (assistant) (voice)

Bill Barretta

as Pepe the Prawn / Bobo as Rentro / Johnny Fiama / Bubba the Rat / Cosmic Fish #2 (voice)