Jason Ian Drucker

Greg Heffley

Alicia Silverstone

Susan Heffley

Tom Everett Scott

Frank Heffley

Charlie Wright

Rodrick Heffley

Owen Asztalos

Rowley Jefferson

Wyatt Walters

Manny Heffley

Joshua Hoover

Mac Digby

Mira Silverman

Brandi Beardo

Chris Coppola

Beardo

Kimberli Lincoln

Mrs. Beardo

Dylan Walters

Manny Heffley

Danny Vinson

Hog Man

Neva Howell

Farmer Lady

Ricky Muse

Butter Vendor

Taylor St. Clair

Carnie

Kurt Yue

Fake Dad

Jacinte Blankenship

Security Guard

Beth Keener

Reporter

Mimi Gould

Meemaw

Emma Wetzel

Country Fair Girl

Elijah Marcano

Corny's Host

Apollo GT

XBox Vendor / DXRacer Player

Alexa Blair Robertson

Cute Girl #1

Courtney Lauren Cummings

Cute Girl #2

Robert Hendren

Motorcycle Cop

Stephen Ruffin

Gamer

Lariah Alexandria

Corny Kid (uncredited)

Maiya Boyd

Corny Heeley Kid (uncredited)

Jamel Chambers

Expo Gamer Attendee (uncredited)

Kristen Danielle

Expo Gamer (uncredited)

Jeff Kinney

Man at Player Expo (uncredited)

Shane Donovan Lewis

Corny's Kid (uncredited)

John Merical

Driver (uncredited)