Michael Ouweleen

Erik Richter

Gary Cole

Harvey Birdman (voice)

Thomas Allen

Peanut (voice)

Stephen Colbert

Phil Ken Sebben / Myron Reducto (voice)

John Michael Higgins

Mentok the Mindtaker (voice)

Chris Edgerly

Peter Potamus (voice)

Paget Brewster

Birdgirl (voice)

Peter MacNicol

X the Eliminator (voice)