Jason Ian Drucker
Role: Greg Heffley
Alicia Silverstone
Role: Susan Heffley
Tom Everett Scott
Role: Frank Heffley
Charlie Wright
Role: Rodrick Heffley
Owen Asztalos
Role: Rowley Jefferson
Wyatt Walters
Role: Manny Heffley
Joshua Hoover
Role: Mac Digby
Mira Silverman
Role: Brandi Beardo
Chris Coppola
Role: Beardo
Kimberli Lincoln
Role: Mrs. Beardo
Carlos Guerrero
Role: Luis
Dylan Walters
Role: Manny Heffley
Danny Vinson
Role: Hog Man
Stephen 'Big Steve' Dupree
Role: Tall Farmer
Neva Howell
Role: Farmer Lady
Ricky Muse
Role: Butter Vendor
Taylor St. Clair
Role: Carnie
Jacinte Blankenship
Role: Security Guard
Beth Keener
Role: Reporter
Emma Wetzel
Role: Country Fair Girl
Elijah Marcano
Role: Corny's Host
Apollo GT
Role: XBox Vendor / DXRacer Player
Alma Kent
Role: Teen Bystander
Alexa Blair Robertson
Role: Cute Girl #1
Courtney Lauren Cummings
Role: Cute Girl #2
Robert Hendren
Role: Motorcycle Cop
Sofia Bowers
Role: Pigtails Girl
Jody Thompson
Role: Uncle Gerald
Stephen Ruffin
Role: Gamer
Anthony Ianitello
Role: Diaper Hands Cosplayer
Nathaniel Dickson
Role: Brandon Beardo
Jake Sterner
Role: Brent Beardo
Bobby Akers
Role: Gaming Expo Attendee (uncredited)
Lariah Alexandria
Role: Corny Kid (uncredited)
Madison Alsobrook
Role: Expo Kid (uncredited)
Cassidy Balkcom
Role: Corny's Waitress (uncredited)
Taylor Barton
Role: Fair Kid (uncredited)
Alicia Beshears
Role: Fair Teen (uncredited)
Kimberly Blaurock
Role: Professional Cosplayer (uncredited)
Joshua Booker
Role: Gaming Expo Attendee (uncredited)
Maiya Boyd
Role: Corny Heeley Kid (uncredited)
Michael Bunch
Role: Laughing Corny's Waiter (uncredited)
Benton Burnett
Role: Cowboy Family (uncredited)
Randy Burnett
Role: Cowboy Family (uncredited)
Jamel Chambers
Role: Expo Gamer Attendee (uncredited)
Jeremy Chesser
Role: Corny Patron (uncredited)
Kristen Danielle
Role: Expo Gamer (uncredited)
Aerielle Dodson
Role: Goth County Fair Patron (uncredited)
Jacob Evans
Role: Expo Kid (uncredited)
Juan Gaspard
Role: Festival Vendor (uncredited)
James Gill
Role: Steampunk Giant (uncredited)
Ben Hammock
Role: Fair Employee (uncredited)
Simone Kiffany Jenkins
Role: Passenger (uncredited)
Kenneth Jones
Role: Mechanic (uncredited)
Tegan Jones
Role: Party Guest (uncredited)
Jeff Kinney
Role: Man at Player Expo (uncredited)
Tylon Larry
Role: Fair Kid (uncredited)
Shane Donovan Lewis
Role: Corny's Kid (uncredited)
John Merical
Role: Driver (uncredited)
Davis Pak
Role: Boy (voice) (uncredited)
Anthony Vance Pierce
Role: Adult Fairgoer (uncredited)
Candy Rachor
Role: Corny Patron (uncredited)
Jonathan Rush
Role: Expo Gamer Attendee (uncredited)
