Adrien Brody

as Henry Barthes

Marcia Gay Harden

as Principal Carol Dearden

James Caan

as Mr. Charles Seaboldt

Christina Hendricks

as Ms. Sarah Madison

Lucy Liu

as Dr. Doris Parker

Blythe Danner

as Ms. Perkins

Tim Blake Nelson

as Mr. Wiatt

William L. Petersen

as Mr. 'Sarge' Kepler