Neil Patrick Harris as Arnold Mosk

Matthew Lillard as Doug Van Housen

Gabriel Olds as Gary Trancer

Catherine Hicks as Mrs. Mosk

Stephen Pearlman as Principal Jones

Ryan Payne Bell as Pink

Lori Heuring as Shelly

Eddie Malavarca as Porky

Amanda Peet as Debbie

Dechen Thurman as Hinge

Brian Vincent as Eddie LeMaster

Joseph Siravo as Dr. Rankin

Tina Krause as Acid Woman in Black

John Paul Fedele as Spring Heeled Jack

J.J. North as Acid Woman in White

Frank Vincent as Arcade Owner

Peggy Gormley as Jones' Secretary

Huckleberry Fox as Baldy

Pamela Kramer as Teacher 1

John Digaletos as Teacher 2

Madison Arnold as Older Guard

Paula Stevens as Teacher 3

Scott MacCann as Gary's Friend

Stephen Payne as Classroom Guard / Lesson Giver

Paul Fremder as Classroom Guard

Judith Singer as School Secretary

Susan Singer as Mother

Torri Singer as Torri

Doug DeLuca as Gary's Teammate

Scott Hathaway as Guitar Player

James V. Bacco as Van Housen Butler

Paul Venier as Bubble Face

Peter James as Arcade Punk

Elizabeth Kemp as Shelly's Mom

Jeff Hayenga as Shelly's Dad

Michael Torpey as Shelly's Brother

Jason Werner as Lead Thug

Kate Ingram as Drama Teacher

Michale Graves as The Misfits

Doyle Wolfgang von Frankenstein as The Misfits

Jerry Only as Self - The Misfits

Dr. Chud as The Misfits

Frank DaPuzzo as Baldy's Father

Cassandra Singer as Van Housen's Girl

C.J. Singer as C.J. Trancer

Jane Seaman as Mrs. Trancer

Debbie Smith as Stunned Teacher

Yomi Lawal as Doctor

Penny Poor as Scary Nurse

Romano Mosca as Cop

Jeff Skalecki as Rookie Cop

Allen Fitzpatrick as Teacher 4 (uncredited)

Sal Marino as Thug #1 (uncredited)