Greg Heffley

Zachary Gordon

Acting

Rowley Jefferson

Robert Capron

Acting

Frank J. Heffley

Steve Zahn

Acting

Rodrick Heffley

Devon Bostick

Acting

Susan Heffley

Rachael Harris

Acting

Angie Steadman

Chloë Grace Moretz

Acting

Patty Farrell

Laine MacNeil

Acting

Coach Malone

Andrew McNee

Acting

Manny Heffley

Connor Fielding

Acting

Manny Heffley

Owen Fielding

Acting

Chirag Gupta

Karan Brar

Acting

Fregley

Grayson Russell

Acting

Collin

Alex Ferris

Acting

Mrs. Norton

Belita Moreno

Acting

Mr. Winsky

Rob LaBelle

Acting

Pete Hosey

Nicholas Carey

Acting

Carter

Samuel Patrick Chu

Acting

Wade

Donnie MacNeil

Acting

Shelley

Samantha Page

Acting

Marley

Ava Hughes

Acting

Bryce Anderson

Owen Best

Acting

Quentin

Cainan Wiebe

Acting

Quentin's Sidekick

Cole Heppell

Acting

Darren Walsh

Harrison Houde

Acting

Dieter Muller

Severin Korfer

Acting

Mrs. Flint

Jennifer Clement

Acting

Mrs. Irvine

Karin Konoval

Acting

Vice Principal Roy

Raugi Yu

Acting

Rowley's Mom

Kaye Capron

Acting

Archie Kelly

Jake D. Smith

Acting

Arthur

Talon Dunbar

Acting

Cheese Girl

Naomi Dane

Acting

Cheese Boy

Willem Jacobson

Acting

Coach Brewer

Sean Bygrave

Acting

Elderly Woman

Maxine Miller

Acting

Granddaughter

Taya Clyne

Acting

Grown-Up Greg

Nathaniel Marten

Acting

Grown-Up Quentin

Peter New

Acting

Lunch Girl #1

Nikki Frazer

Acting

Lunch Kid #2

Greta Makena Gibson

Directing

Kindergarten Boy

Nathan Smith

Acting

Kindergarten Girl

Kinua McWatt

Acting

Kindergarten Greg

Dylan Bell

Acting

Kindergarten Patty

Madison Bell

Acting

Marty Porter

Adom Osei

Acting

Mr. Jefferson

Alf Humphreys

Acting

Mr. Parnell

Brent Chapman

Acting

Preston

Rylee Stiles

Acting

Rodney James

Ryan Grantham

Acting

Snot Kid

Ethan Shankaruk

Acting

Unpopular 80s Boy

Jesse Wheeler

Acting

Brock Branigan

Paul Hubbard

Acting

80s Breakdancer

Brett Dier

Acting

80s Jock Boy

Brandon Barton

Acting

80s Popular Girl

Cindy Busby

Acting

Audition Kid

Alicia Takase Lui

Acting

Audition Kid

Jay Sidhu

Acting

Audition Kid

Tori Christianson

Acting

Audition Kid

Emerald Schreier

Acting

Audition Kid

Ben Mitchell

Acting

Audition Kid

Haris Cash

Acting

Audition Kid

Mariah Crudo

Acting

Male Reporter (voice)

Alistair Abell

Acting

Female Reporter (voice)

Tara McGuire

Acting

Löded Diper

Aidan Gebert

Acting

Löded Diper

Cameron Krpan

Acting

Löded Diper

Paolo Tolfo

Acting

Waitress (uncredited)

Amy Esterle

Acting

Parent (uncredited)

John Cygan

Acting