Journal d'un dégonflé : Ça fait suer !

Melody B. Choi as Snack Bar Girl Joshua J. Ballard as Spag Union Math Boy Peyton List as Holly Hills Bronwen Smith as Isabella Wendell-Jefferson Tom Stevens as Lenwood Heath Bryce Hodgson as Ben Segal Amitai Marmorstein as Cranium Shaker Operator Doug Abrahams as Rodrick's Rescuer Steve Zahn as Frank Heffley Dawn Chubai as Newscaster Trenton Rogers as Student (voice) (uncredited) Owen Fielding as Manny Heffley Elise Gatien as Madison John Shaw as Mr. Draybick Amy Esterle as Country Club Waitress Matt Mazur as Spag Union Tracking Device Boy Keith MacKechnie as Man in Kitchen Rachael Harris as Susan Heffley Russell Roberts as Confederate Soldier Grayson Russell as Fregley Frank C. Turner as Troop Master Barrett BJ Harrison as Dry Cleaner Roan Curtis as Girl at Cranium Shaker #1 Melissa Roxburgh as Heather Hills Christopher De-Schuster as Chris the Bass Player Kevin Kruchkywich as Country Club Pool Guy Terence Kelly as Grandpa Heffley Emily Holmes as Mrs. Hills Reese Alexander as Cop Kyle Cassie as Country Club Waiter Simon Chin as Restaurant Owner Robert Capron as Rowley Jefferson Zachary Gordon as Greg Heffley Laine MacNeil as Patty Farrell Devon Bostick as Rodrick Heffley Jeff Kinney as Mr. Jonathon Hills Latonya Williams as Receptionist Amy Philip Maurice Hayes as Stan Warren Andrew McNee as Coach Malone Nicole Fraissinet as Receptionist Julie Jared Abrahamson as Tim Warren Anne Openshaw as Mrs. Warren Connor Fielding as Manny Heffley Alf Humphreys as Mr. Jefferson Dalila Bela as Taylor Pringle Peter Brown as Popcorn Vendor (uncredited) Karan Brar as Chirag Gupta

Edward Shearmur Original Music Composer Ronna Kress Casting Nina Jacobson Producer Wallace Wolodarsky Screenplay David Bowers Director J.J. Makaro Stunts Anthony B. Richmond Director of Photography Brad Simpson Producer Troy Takaki Editor Jeff Kinney Book, Executive Producer Maya Forbes Screenplay Kimberley von Ilberg Stunts