Tara Strong as Timmy Turner / Blonda Fairywinkle / Supermodel (voice)

Daran Norris as Cosmo / Mr. Dad Turner / Jorgen Von Strangle (voice)

Susanne Blakeslee as Wanda / Mrs. Mom Turner / Witch / Supermodel (voice)

Carlos Alazraqui as Denzel Q. Crocker / Juandissimo Magnifico / The Mayor (voice)

Jason Marsden as Chester McBadbat / Aladdin Guy / Guard #2 (voice)

Gary LeRoi Gray as A.J. (voice)

Rob Paulsen as Bucky McBadbat / Government Agent #1 / William Hung (voice)

Dee Bradley Baker as Binky / Fairy Detector / Leprechaun (voice)

Jim Ward as Chet Ubetcha / Lawn Gnomes / Spokesfan (voice)

Robert Cait as Norm the Genie (voice)

Diana DeGarmo as Cosmo (singing voice)

Ben Stein as Head Pixie / Sanderson / The Pixies (voice)

Tom Kenny as Cupid / Bucky's Agent / Fairy Newscaster (voice)

Grey DeLisle as Tooth Fairy / Fairy Reporter (voice)

Butch Hartman as Santa / Sun / Penguins (voice)