Cam Clarke
Robert the Terrible / The King (voice)
Phil Vischer
George / Sedgewick / Willory / Sir Frederick / Mr. Hibbing / Bob the Tomato / Pirate Spy / Pirate Philippe Pea (voice)
Mike Nawrocki
Elliot / Pirate Jean Claude Pea / Theater Foe / Pirate Spy Sidekick / Pirate with Dummy / Rock Monster Father (voice)
Tim Hodge
Jolly Joe / King's Ship Officer / Background Voices (voice)
Jim Poole
Pirate Scooter Carrot (voice)
Yuri Lowenthal
Alexander (voice)
Brian K. Roberts
Steadfast Soldier / Theater Customer Man / Pirate Pilot (voice)
Megan Murphy
Madame Blueberry (voice)
Cydney Trent
Bernadette (Petunia) (voice)
J. Chris Wall
Background Voices (voice)
Keri Pisapia
Ellen (voice)
Laura Gerow
Eloise (voice)
Sondra Morton Chaffin
Caroline (voice)
Drake Lyle
George Jr. / Rock Monster Boy (voice)
Ally Nawrocki
Lucy / Rock Monster Girl (voice)
Patrick Kramer
Collin (voice)
John Wahba
Dungeon Guard / Pirate with Dummy Sidekick (voice)
Kurt Heinecke
Background Voices (voice)
Joe Spadaford
Jacob Lewis / Stubb Pirate Overlord / Stubb Pirate Coward (voice)
Michael Fowler
Background Voices (voice) (as Michael 'C.J.' Fowler)
Paula Marcus
Background Voices (voice)
Sloan Yarborough
Photographer (voice)
Colleen Curtis
Theater Customer Woman (voice)
Alan Lee
Blind Man / One-Eyed Louie (voice)
Marissa Collyer
Background Voices (voice)
Andy Youssi
Background Voices (voice) (as Andrew Youssi)