Marshall et Simon

Omri Katz

Marshall Teller

Justin Shenkarow

Simon Holmes

Mary-Margaret Humes

Marilyn Teller

Julie Condra

Syndi Teller

Francis Guinan

Edgar Teller

Archie Hahn

Fred Suggs / Mr. Radford

Jason Marsden

Dash X

John Astin

Radford

Harry Goaz

Sgt. Knight

Belinda Balaski

Mother / Winifred Swanson

Steve Peri

Old Elvis (as Steven Peri)

Dan Stanton

Adult Bertram Wilson / Bertram Wilson

Don Stanton

Adult Ernest Wilson / Ernest Wilson

Lauri Hendler

Fifi (voice)

Denise Richards

Girl #2 (as Denise Lee Richards)

Daniel Evans

Bob Bob

Michael J. Pollard

Claude

Taylor Fry

Little Girl

T. C. Warner

Andrea

Nikki Cox

Janet

Aron Kincaid

Fluffy (voice)

Shanelle Gray

Sara Bob

Tobey Maguire

Tripp McConnell

Stephen Root

Mr. Chaney

Claude Akins

Bank Robber / Grungy Bill

Stefanos Miltsakakis

Nanny Arnold

Jacob Gelman

Moe Bob

Sean Babb

Lou Bob

Richard Grove

Dad Bob

Herta Ware

Mary B. Carter

Aimee Brooks

Young Mary

Jeff Fried

Paramedic

Eric Christmas

Milkman

Lindsey Ginter

Garbage Collector

Gregory Itzin

The Mayor

John Standing

Professor Nigel Zirchon

Kelly Connell

Weatherman Wally

Matt Frewer

Howard Raymer

Kyle Secor

Todd Ski (uncredited)

Anita Morris

Eunice Danforth / Marshall Teller

Paul Sand

Charles Furnell / Simon Holmes

Ray Walston

Ned

René Auberjonois

The Donald

Bryan Clark

IRS Man

Doug Llewelyn

Anchorman

Carmen Anita Ray

Carmen

Riley Weston

Girl #1 (as Kimberlee Kramer)

Virginia Watson

Makeup Artist

Leland Orser

Assistant Director

Joe Dante

Director / Himself

Sachi Parker

Secretary

Julius Harris

Prop Man

Mark Blankfield

Jose Schaefer

Tom Everett

Tod's Dad

Grant Gelt

Tod McNulty

Gwynyth Walsh

Tod's Mother

Andrew White

Officer Derek

Tony Jay

Sir Boris von Orloff

Christian Cousins

Harley Holmes

Joseph Cousins

Harley Holmes