David Cassidy
Adam-11
Olivia d'Abo
Chanel-6
Steven Shane McDonald
Tommy Sears
Jeffrey McDonald
Chris Johnson
Geoff Hoyle
Heinz-57
Leif Garrett
Eddie Trojan
Liam O'Brien
Rodney Snodgrass
Mark Mothersbaugh
Chevron-17
Gerald V. Casale
Yale-44
Carl Reiner
Dr. Von Mobil
Bob Casale
Ron-29
David Kendrick
Ron-31
Rob Reiner
Dr. Cash
Moon Unit Zappa
Cheryl Dickman
Tommy Chong
Stoner
Shelby Chong
Cashier
Barbara Bain
Hipster
Julie Brown
Ms. Liberty
Iron Eyes Cody
Iron Eyes Cody
Sofia Coppola
Girl in Parade
Nancye Ferguson
Nurse
Ann Block
Chris' Mom
Martin von Haselberg
Agent 1
Brian Routh
Agent 2
Maud Winchester
Cyndi the Waitress
Lorri Holt
Cop #1
Jerry Carlton
Streaker
Todd A. Rolle
Clovis
Don Novello
Translator
Lucas Reiner
Fireworks Barker
Michael McShane
Angry Driver
Morgan Upton
Teacher
Leigh French
Voice of the Future
Charles Dean
Chris' Dad
Michael Jerome West
Guard (as Tree)
Ryan Wallace
Chester
Lisa Houston
Heckler
Jack Blessing
Voice Talent (voice)
Lisa Michelson
Voice Talent (voice)
Tracy Newman
Voice Talent (voice)
Gregory Snegoff
Voice Talent (voice)
Jonathan Stark
Voice Talent (voice)
Arnold F. Turner
Voice Talent (voice)
Ian Davidson
Guy outside disco (uncredited)
Mikael Johnston
Dancer (uncredited)
Markus Maguire
Date Male Restaurant/ Onlooker at Science Fair (uncredited)
Tyrone M. Sanders
Dancer (uncredited)