John Francis Daley as Pat Johnson

Colleen Camp as Janet Johnson

Steve Coulter as Bill Holmes

Emmi Chen as Linda Augustyniak

Katie Jeep as Robin Braden

Mark Lorenz as Donny Allen (as Mark Buenning)

Gwen Kmiec as Jody Johnson (as Gwen Streitmatter)

Eric Miles as Jay Johnson

Tim Beringer as Eric Johnson

Ema Tuennerman as Dawn Ferry

Eddie Kunz as Jeff Greene

George Campbell as Jim

Neil Flynn as Dr. Callahan

Justin Mentell as Tony Vesuvio

Caitlin Barlow as Jenny Bodziak

Christopher McLinden as Doug Osterland

Austin Pendleton as Herb Lightman

Kevin J. Stephens as Steven Spielberg

David Shin as Greg Jein

Michael Pawlak as Douglas Trumbull

Daniel Behrendt as John Dykstra

Jack C. Newell as Richard Yuricich

Jocelyn Levin as Receptionist

William Holmes as Todd

Nancy Oda as Mrs. Augustyniak

John Udd as Mr. Augustyniak

Jordan Keeler as Eddie

Patrick Read Johnson as Dr. Francis Neal Johnson

Jenni Hopkins as Young Janet Johnson

Bob Sirott as WLS Radio Disc Jockey

Mancow Muller as Burly Bowler

Fred Schutz as Emphysemic Bowler

Michael A. Colle as Bowling Extra

J. Spencer Greene as Comedian

Coady Johnson as Pat (age 12)

Zach Barton as Pat (age 9)

Lonnie Rufa as Pat (age 8)

Rachel Barton as Pat (age 7)

Wyatt Mowery as Bill (age 9)

Grace Nemeth as Robin (age 9)

Max Barnes as Eric (age 8)

Maya Vilchik as Jody (age 5)

Eitan Vilchik as Donny (age 9)

Grady Mowery as Neighborhood Kid

Jason Economus as Scott Holmes

Yasmin Golan as Anne Armstrong

Matt Ukena as ILM employee / X-wing maker

Tony Farella as Teacher

James Zahn as Student

Mike Markoff as Jock

Matt Hansen as Ray

Nicholas Joseph Harden as Pete (as Nick Harden)

Gunner Jones as Gail Dart

Lora Korbas as Mrs. Vanderspool

Rich Pope as Mr. Chesterfield

Billy Uer as Mr. Vesuvio

Robin Ducy as Emergency Nurse

Donna Brooks as Payroll Clerk

Elizabeth Hipwell as Administrator

Nick Izzo as Football Player

Al Leinonen as Bud Holmes

Adam Leiphart as Hula Guy

Suzannah Kizt as Lunch Lady

Steve Leonard as The Visitor

Sara Maderer as Little Girl at Mall

Adam Shalzi as Geek

John D. Hershner III as Mike Nurnie