Greg Heffley
Zachary Gordon
Rowley Jefferson
Robert Capron
Manny Heffley
Connor Fielding
Owen Fielding
Stan Warren
Philip Maurice Hayes
Grandpa Heffley
Terence Kelly
Isabella Wendell-Jefferson
Bronwen Smith
Mr. Jefferson
Alf Humphreys
Madison
Elise Gatien
Mr. Draybick
John Shaw
Coach Malone
Andrew McNee
Lenwood Heath
Tom Stevens
Rodrick Heffley
Devon Bostick
Ben Segal
Bryce Hodgson
Chris the Bass Player
Christopher De-Schuster
Taylor Pringle
Dalila Bela
Troop Master Barrett
Frank C. Turner
Mrs. Hills
Emily Holmes
Mr. Jonathon Hills
Jeff Kinney
Cranium Shaker Operator
Amitai Marmorstein
Girl at Cranium Shaker #1
Roan Curtis
Girl at Cranium Shaker #2
Sydney Wong
Cop
Reese Alexander
Holly Hills
Peyton List
Country Club Manager
Cameron Mitchell Jr.
Receptionist Amy
Latonya Williams
Receptionist Julie
Nicole Fraissinet
Rodrick's Rescuer
Doug Abrahams
Snack Bar Girl
Melody B. Choi
High Diving Fan
Wanda Ayala
Country Club Waiter
Kyle Cassie
Country Club Pool Guy
Kevin Kruchkywich
Country Club Waitress
Amy Esterle
Country Club Valet
Gerry Durand
Frank Heffley
Steve Zahn
Spag Union Math Boy
Joshua J. Ballard
Spag Union Tracking Device Boy
Matt Mazur
Tim Warren
Jared Abrahamson
Biff Warren
Matteo Stefan
Chip Warren
Collin MacKechnie
Li'l Cutie
Sofia Bowers
Newscaster
Dawn Chubai
Mrs. Warren
Anne Openshaw
Man in Kitchen
Keith MacKechnie
Restaurant Owner
Simon Chin
Susan Heffley
Rachael Harris
Dry Cleaner
BJ Harrison
Confederate Soldier
Russell Roberts
Spag Union Announcer
Paul Fisher
Spag Union Boy
David Palacio
Popcorn Vendor (uncredited)
Peter Brown
Student (uncredited)
Zeeshan Goawala
Cook on Phone (uncredited)
Mark Redsky
Student (voice) (uncredited)
Trenton Rogers
Union Rifleman (uncredited)
Cameron K. Smith
Sunblock Guy (uncredited)
James O'Sullivan
Fregley
Grayson Russell
Bus Driver (uncredited)
Ian Thompson
Chirag Gupta
Karan Brar
Heather Hills
Melissa Roxburgh
Patty Farrell
Laine MacNeil
Editor
Troy Takaki
Stunts
J.J. Makaro
Book
Executive Producer
Director of Photography
Anthony B. Richmond
Original Music Composer
Edward Shearmur
Director
David Bowers
Producer
Nina Jacobson
Brad Simpson
Screenplay
Wallace Wolodarsky
Maya Forbes
Kimberley von Ilberg
Casting
Heike Brandstatter
Costume Design
Monique Prudhomme
Production Design
Brent Thomas
Ronna Kress
Jeremiah Samuels
Art Direction
Shannon Grover
Coreen Mayrs
Set Decoration
Mary-Lou Storey