- Josef Ostendorf
- Mr. Lou Dollart
- Beverly D'Angelo
- Mrs. Dollart
- Lauren Hutton
- Evelyn Jellybelly
- Jerry Stiller
- Prof. Plumpingham
- Steffen Wink
- Nick McRafferty
- Andreas Herder
- Tom O'Dooley
- Jonathan Kinsler
- Architekt Stressback
- Yoshinori Yamamoto
- Mr. Futon San
- Jack Recknitz
- Texaner
- Dee Bradley Baker
- Monty Mad-Rat Jr.
- Lynsey Bartilson
- Isabella Noble-Rat
- Raymond Guth
- Old Monty
- Scott MacDonald
- Rudi Rake-Rat
- Donald Arthur
- Jean-Paul Canalligator
- Natja Brunckhorst
- Mrs. Lucy
- Klaus Havenstein
- Monty Senior
- Gudo Hoegel
- Rudi Raffratz
- Harald Leipnitz
- Finanzminister Erwin Geizratz
- Merrick McMahon
- (voice)
- Philipp Moog
- Monty Spinnerratz
- Carmen Plate
- Isabella Nobelratz
- Friedrich Schoenfelder
- Walter Demokratz
