Amanda Donohoe as Gayle Richards/Laura Ellington

Natasha Gregson Wagner as Jenny

Mark Wahlberg as Ryan Westerberg

Dalton James as Josh Wyatt

Eugene Robert Glazer as Ben Wyatt

Patricia Gage as Principal Beatty

Shelley Owens as Amy Cooper

Brigitta as Margo

David Frankham as Riggs

Christian Svensson as David Korczuk

Cusse Mankuma as Bernard

Molly Parker as Courtney

Lossen Chambers as Kim

D. Neil Mark as Rusty

Martin Martinuzzi as Doug Richards

Justine Priestley as Claire Bilino

Fran Gebhard as Female Teacher

Pat Bermel as Frank

Gary Jones as Elliott

Meredith Bain Woodward as Fran

Sheila Paterson as Mrs. Fisher

Deryl Hayes as Medical Technician

Andrew Wheeler as Doctor

Bobby Stewart as Policeman

Douglas Newell as Principal

Glen Mauro as Twin #1

Gary Mauro as Twin #2

Andrew Marley-Clarke as Student

Martin Cummins as Student (uncredited)