as David Lightman
as Dr. Niko Tatopoulos
as Phillipe Gaston
as Richard Feynman
as Sam
as Clark Kellogg
as Despereaux (voice)
as Adam McMullen
as Michael McPhae
as Self
as William Lightbody
as Adam Flayman (voice)
as Hubble (voice)
as Simba (voice)
as Professor Harold Hill
