Brady Noon
Greg Heffley (voice)
Ethan William Childress
Rowley Jefferson (voice)
Hunter Dillon
Rodrick Heffley (voice)
Erica Cerra
Susan Heffley (voice)
Chris Diamantopoulos
Frank Heffley (voice)
Gracen Newton
Manny (voice)
Christian Convery
Fregley (voice)
Jessica Mikayla Adams
Braces Girl (voice)
Cyrus Arnold
Teen Driver (voice)
Braxton Baker
Teen with Mullet (voice)
Lossen Chambers
Homeroom Teacher (voice)
Brenda Crichlow
Mrs. Fregley (voice)
Tessa Espinola
Curly-Haired Girl (voice)
Yuvraj Singh
Charles Davies (voice)
Billy Lopez
Mr. Underwood (voice)
Donny Lucas
Mr. Humphreys (voice)
Veda Maharaj
Chirag Gupta (voice)
Jaime Maclean
Holly Hills’s Friend (voice)
Robert Moloney
Joshie (voice)
Gig Morton
Random Boy (voice)
Mizinga Mwinga
Wizard (voice)
John Omohundro
Hulking Teen (voice)
Zeno Robinson
Teen with Baseball Hat (voice)
Gracyn Shinyei
Girl with Ponytail (voice)
Áine Sunderland
Blonde-Haired Girl (voice)
Tristan Allerick Chen
Additional Voices (voice)
Jeff Kinney
Producer
Swinton O. Scott III
Director
John Paesano
Original Music Composer
Jeff Kinney
Book
Micah Dahlberg
Casting
Kenneth L. Johnson
Sound Re-Recording Mixer
Sean Evans
Sound Designer
Michael Huang
Sound Re-Recording Mixer
Jeff Kinney
Screenplay
Jeff Kinney
Character Designer
Sylvain Blais
Editor
Trent Noble
Animation Supervisor
Rick Mischel
Executive Producer