Rick Moranis as David Leary

Tom Arnold as Rosco Bigger - Fang

Julianne Phillips as Victoria Tucker

Carol Kane as Faith Bigger

Jeffrey Tambor as Art Lundstrum

Curtis Armstrong as Clark

Don Knotts as Principal Kokelar

Doug Abrahams as Guard

Faith Prince as Betty Lundstrom

Tony Pierce as Ulf

Blake Bashoff as Ben Leary

Cody McMains as Kirby Bigger

Harry Waters, Jr. as Alan

Stuart Pankin as Gerry

Justin Jon Ross as Young David

Michael Zwiener as Young Fang

Bill Dow as David's Father

Tiffany Foster as Young Victoria

Matthew Slowik as Young Ulf

C.J. Grayson as Young Alan

Grant Hoover as Young Gerry

Susan Bain as David's Mother

Christine Willes as Teacher - 1970

Ingrid Torrance as Fourth Grade Teacher

Tyler Van Blankenstein as Freckle-Faced Kid

Lillian Carlson as Old Woman

Matt Hill as Nigel at Bookstore

Kate Twa as Shop Clerk

Norma MacMillan as Mrs. Rumpert

Tegan Moss as Girl in Class

Eryn Collins as Kid #1

Gregory Smith as Kid #2

Lois Dellar as Teacher #1

Alf Humphreys as Teacher #2

Claire Riley as Sympathetic Teacher

Brent Morrison as Stookie

Alexander Pollock as Corky

Kyle Labine as Stevie

Zachary Webb as Kyle

Eric Pospisil as Bobby

Miriam Smith as Crying Teacher

Colum Cantillion as Paul

Dawn Stofer-Rupp as Secretary

Steven Taylor as Hallway Kid #1

Justin Goodrich as Hallway Kid #2

Anthony Pavlokovic as Hallway Kid #3

Andrew Wheeler as Soldier

James Sherry as Delinquent #1

Tommy Anderson as Delinquent #2

Tina Klassen as Korean Lady in Bookstore

Tamara Stanners as Connie

Helena Yea as Connie TV Guest

Ray Fairchild as Connie TV Guest

Gary Foster as Bar Patron (uncredited)

Ryan Mennie as Boy with Baskeball (uncredited)

Robert Miller as Wrestler on TV (uncredited)

Brian Wickens as Wrestler on TV (uncredited)