Greg Heffley
Rowley Jefferson
Frank J. Heffley
Rodrick Heffley
Susan Heffley
Angie Steadman
Patty Farrell
Coach Malone
Manny Heffley
Chirag Gupta
Fregley
Collin
Mrs. Norton
Mr. Winsky
Pete Hosey
Carter
Wade
Shelley
Marley
Bryce Anderson
Quentin
Quentin's Sidekick
Darren Walsh
Dieter Muller
Mrs. Flint
Mrs. Irvine
Vice Principal Roy
Rowley's Mom
Archie Kelly
Arthur
Cheese Girl
Cheese Boy
Coach Brewer
Elderly Woman
Granddaughter
Grown-Up Greg
Grown-Up Quentin
Lunch Girl #1
Lunch Kid #2
Kindergarten Boy
Kindergarten Girl
Kindergarten Greg
Kindergarten Patty
Marty Porter
Mr. Jefferson
Mr. Parnell
Preston
Rodney James
Snot Kid
Unpopular 80s Boy
Brock Branigan
80s Breakdancer
80s Jock Boy
80s Popular Girl
Audition Kid
Male Reporter (voice)
Female Reporter (voice)
Löded Diper
Waitress (uncredited)