Greg Heffley
Susan Heffley
Frank Heffley
Rodrick Heffley
Rowley
Manny Heffley
Mac Digby
Mr. Beardo (as Christopher A. Coppola)
Brandi Beardo
Luis
Hog Man
Tall Farmer
Farmer Lady
Butter Vendor
Carnie
Fake Dad
Security Guard (as Jacinté Blankenship)
TV Reporter
Teen Bystander
Meemaw
Cute Girl #1
Cute Girl #2
Motorcycle Cop
Pigtails Girl
Country Fair Girl (as Emma Isabella Wetzel)
Corny's Host
Uncle Gerald
Gamer
Diaper Hands Cosplayer
Mrs. Beardo
Brandon Beardo
Brent Beardo
Gaming Expo Attendee (uncredited)
Corny Kid (uncredited)
Expo Kid (uncredited)
Video Game Vendor (uncredited)
Corny's Waitress (uncredited)
Fair Kid (uncredited)
Fair Teen (uncredited)
Professional Cosplayer (uncredited)
Corny Heeley Kid (uncredited)
Laughing Corny's Waiter (uncredited)
Cowboy Family (uncredited)
Expo Gamer Attendee (uncredited)
Corny Patron (uncredited)
Expo Gamer (uncredited)
Fanboy Gamer Expo / Fair Teen (uncredited)
Goth County Fair Patron (uncredited)
County Fair Patron in Floral (uncredited)
Corny's Parent (uncredited)
Mee Maws friend (uncredited)
Festival Vendor (uncredited)
Steampunk Giant (uncredited)
XBox Vendor / DXRacer Player (uncredited)
Fair Employee (uncredited)
Passenger (uncredited)
Mechanic (uncredited)
Party Guest (uncredited)
Man Splashed by the Pool (uncredited)
Man at Player Expo (uncredited)
Corny's Kid (uncredited)
Driver (uncredited)
Gamer / Picture Car (uncredited)
Boy (voice) (uncredited)
Adult Fairgoer (uncredited)
Hotel Pardon (uncredited)
Fairgoer (uncredited)
Corny Parent (uncredited)