Igor (voice)
John Cusack
Dr. Holzwurm (voice)
Myleene Klass
Eva (voice)
Molly Shannon
Himself
James Lipton
Dr. Schadenfreude's Igor (voice)
Christian Slater
Carl Cristall (voice)
Arsenio Hall
Announcer / Royal Guard #2 (voice)
Jess Harnell
Blind Woman / Killiseum Fan #1 (voice)
Zoë Bright
Blind Orphan #1 (voice)
Sophia Eraklis
Blind Orphan #2 / Blind Orphan #4 (voice)
A. Cheron Hall
Blind Orphan #3 (voice)
Alexander Leondis
Blind Orphan #6 (voice)
Michael Leondis
Dr. Holzwurm's Igor (voice)
Robin Walsh
Blind Orphan #7 (voice)
Nicole Leondis
Blind Orphan #5 (voice)
Juliana Leondis
Blind Orphan #8 (voice)
Robin Tisserand
Buzz Offmann (voice)
Paul Vogt
Animals' vocal effects (voice) (uncredited)
Frank Welker
Dr. Herzschlag (voice)
Matt McKenna
Dr. Glickenstein (voice)
John Cleese
Scamper (voice)
Steve Buscemi
Brain (voice)
Sean Hayes
Dr. Schadenfreude (voice)
Eddie Izzard
King Malbert (voice)
Jay Leno
Jaclyn / Heidi (voice)
Jennifer Coolidge
Original Music Composer
Patrick Doyle
Screenplay
John Hoffman
Editor
Hervé Schneid
Director
Tony Leondis
Chris McKenna
Dimitri Toscas
Animation
Steven Clay Hunter
Executive Producer
Jean-Luc De Fanti
Associate Producer
Jamée Deruso
Producer
John D. Eraklis
Max Howard
Darius A. Kamali
Matthew J. Parker
Production Design
Loïc Rastout
Art Direction
Olivier Besson
Zoltán Maros