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