Jerry Nelson

as Mad Monty / Boar / Lew Zealand / Shrimp / Whatnots (voice)

Kevin Clash

as Bad Polly / Spa'am (voice)

Bill Barretta

as Clueless Morgan (voice)

Camille Bonora

as Female Pirate (voice)

Steve Whitmire

as Kermit the Frog / Rizzo the Rat / Pig (voice)

Martin P. Robinson

as Shark / Big Snort (voice)

Peter Linz

as Additional Muppets (voice)

Joey Mazzarino

as Additional Muppets (voice)

Carmen Osbahr

as Additional Muppets (voice)

Dave Goelz

as The Great Gonzo (voice) (archive footage)

John E. Kennedy

as Additional Muppets (voice)