Greg Heffley
Rowley Jefferson
Rodrick Heffley
Holly Hills
Frank Heffley
Susan Heffley
Fregley
Chirag Gupta
Heather Hills
Patty Farrell
Manny Heffley
Stan Warren
Grandpa Heffley
Isabella Wendell-Jefferson
Mr. Jefferson
Madison
Mr. Draybick
Coach Malone
Lenwood Heath
Ben Segal
Chris the Bass Player
Taylor Pringle
Troop Master Barrett
Mrs. Hills
Mr. Jonathon Hills
Cranium Shaker Operator
Girl at Cranium Shaker #1
Girl at Cranium Shaker #2
Cop
Country Club Manager
Receptionist Amy
Receptionist Julie
Rodrick's Rescuer
Snack Bar Girl
High Diving Fan
Country Club Waiter
Country Club Pool Guy
Country Club Waitress
Country Club Valet
Spag Union Math Boy
Spag Union Tracking Device Boy
Tim Warren
Biff Warren
Chip Warren
Li'l Cutie
Newscaster
Mrs. Warren
Man in Kitchen
Restaurant Owner
Dry Cleaner
Confederate Soldier
Spag Union Announcer
Spag Union Boy
Popcorn Vendor (uncredited)
Student (uncredited)
Cook on Phone (uncredited)
Student (voice) (uncredited)
Union Rifleman (uncredited)
Sunblock Guy (uncredited)
Bus Driver (uncredited)