Hilary Duff as Kelly Collins

Christy Carlson Romano as Cadet Captain Jennifer Stone

Gary Cole as "Sir" Joe Maxwell

Shawn Ashmore as Cadet Major Brad Rigby

Aimee Garcia as Gloria

Linda Kash as Samantha

Nigel Hamer as Adam

Sarah Gadon as Amanda

Andrea Lewis as Carla

Joe Matheson as General Archer

Beverlee Buzon as Grace

Dalene Irvine as Marie

Avery Saltzman as Kevin

Christopher Tai as Sr. Cadet Officer

Josh Wittig as Cadet Bugler

Edie Inksetter as Math teacher

Stewart Arnott as Captain Lawrence

Desmond Campbell as Lt. Col. Ross

Tim Post as Col. Mikkelson

Martin Roach as Drill Instructor