Tom Arnold as Stanley Stupid

Jessica Lundy as Joan Stupid

Bug Hall as Buster Stupid

Alex McKenna as Petunia Stupid

Mark Metcalf as Colonel Neidermeyer

Matt Keeslar as Lieutenant Neal

Christopher Lee as Evil Sender

Frankie Faison as The Lloyd

Robert Wise as Stanley's Neighbor

David Ferry as Late-night show host

Norman Jewison as TV Director

Jenny McCarthy-Wahlberg as Glamorous Actress

Atom Egoyan as TV Studio Guard

Gillo Pontecorvo as Talk show guest

David Cronenberg as Postal Supervisor

Costa-Gavras as Gas Station Attendant

Anthony J. Mifsud as Explosive Guy

Rolonda Watts as Talk Show Hostess

George Chiang as Chinese Waiter #1

Max Landis as Graffiti Artist

Gurinder Chadha as Reporter #1

Mick Garris as Reporter #2

Rick Avery as Bad Guy

Robert Keeshan as Charles Sender

Scott Kraft as Policeman

Victor Ertmanis as Garbageman #1

Earl Williams as Garbageman #2

Carol Ng as Jade Palace Hostess

Arthur Eng as Chinese Waiter #2

Jennifer Dean as Meter Maid

Garry Robbins as Extremely Tall Guy

Nicu Branzea as Arms Buyer #1

Richard Crook as Arms Buyer #2

Jeremy Ratchford as Soldier

John Stoneham Jr. as Green Alien

Ken Quinn as Orange Alien

Gillian Vanderburgh as Alien Stewardess

Harvey Atkin as Deli Guy

Markus Parilo as Special Forces Guy

Walter Alza as Taxi Driver

Mo Kelso as Airbag Woman

Sherry Miller as Anchorwoman

Jeff Clarke as Delivery Guy

Wendy Hopkins as TV Assistant Director

Jacqueline McLeod as Make-Up Woman

Frederic Devancker as French Chef

Nicholas Rice as Talk Show Guest #2

Julie Armstrong as Talk Show Guest #3

Philip Akin as Henchman #1

Kevin Conway as Henchman #2

Carol Anderson as Checkpoint Guard

Fiona Highet as Cop #1

Phillip Jarrett as Cop #2

Jim Amross as Cop #3

Wayne Ward as Cop #4

Michael Bell as Xylophone & Kitty (voice)