Spot Helperman / Scott Leadready II / Scott Manly-Manning (voice)
Nathan Lane
Dr. Ivan Krank (voice)
Kelsey Grammer
Barry Anger (voice)
Jay Thomas
Mrs. Boogin (voice)
Estelle Harris
Marsha / Marcia (voice)
Genie Francis
John / Juan (voice)
Anthony Geary
The Blue Fairy (voice)
Rosalyn Landor
Beefeater (voice)
David Maples
Trevor / Taylor / Tyler (voice)
Pamela Adlon
Father (voice)
Timothy Stack
Little Girl (voice)
Emma Steinkellner
Officer White (voice)
Ken Swofford
Leonard Amadeus Helperman (voice)
Shaun Fleming
Younghee (voice)
Lauren Tom
Leslie Dunkling (voice)
Mae Whitman
Conductor (voice)
Kevin Michael Richardson
Mrs. Mary Lou Moira Angela Darling Helperman (voice)
Debra Jo Rupp
Mr. Jolly (voice)
David Ogden Stiers
Pretty Boy (voice)
Jerry Stiller
Dennis (voice)
Paul Reubens
Adele (voice)
Megan Mullally
Principal Crosby Strickler (voice)
Wallace Shawn
Ian Wazselewski (voice)
Rob Paulsen
Storyboard Artist
Alfred Gimeno
Theme Song Performance
Christy Carlson Romano
Additional Writing
Jim Staahl
Character Designer
Kim Roberson
Zac Moncrief
Ennio Torresan Jr.
Director
Timothy Bjorklund
Chuck Klein
Celia Kendrick
Melissa Suber
Supervising Film Editor
Nancy Frazen
Tina Kügler
Assistant Art Director
Christina Long
Billiam Coronel
Associate Producer
Melinda Carrilla
Songs
Cherie Steinkellner
Line Producer
Michael Karafilis
Jim Fisher
Kevin Quinn
Brian Woodbury
Peter Lurye
Sound Editor
Ronald Eng
Fred Gonzales
Jess Winfield
Randy Petersen
Producer
Stephen Swofford
Casting
Jamie Thomason
Art Direction
Gary Baseman
Executive Producer
Screenplay
Bill Steinkellner
Original Music Composer
Stephen James Taylor