Grey DeLisle Organ Lady (voice)
P.L. Brown Priest (voice)
Jabari Banks Lenwood (voice)
Chris Diamantopoulos Frank Heffley (voice)
Bashir Salahuddin Mr. Warren (voice)
Erica Cerra Susan Heffley (voice)
Talon Warburton Narrator (voice)
Jill Basey Mrs. Canfield (voice)
Aaron D. Harris Greg Heffley (voice)
William Stanford Davis Troopmaster Barrett (voice)
Jeff Kinney Book, Producer, Screenplay
Johnny Gidcomb Additional Voices (voice)
Punam Patel Mrs. Winsky (voice)
Susan Leslie Additional Voices (voice)
Eddie Martinez Gruff Neighbor (voice)
Matt Danner Additional Voices (voice), Director
John Paesano Original Music Composer
Lex Lang Additional Voices (voice)
Hope Levy Additional Voices (voice)
Hunter Dillon Rodrick Heffley (voice)
Tina Chow Executive Producer
Kyrie McAlpin Additional Voices (voice)
Sanjay Rao Mr. Gupta (voice)
Matt Nolan Additional Voices (voice)
Gracen Newton Manny Heffley (voice)
Dashiell McGaha-Schletter Ricky Fisher (voice)
Camden Coley Additional Voices (voice)
Randy Pearlstein Mr. Jefferson (voice)
Anders Garrett Additional Voices (voice)
Richard Grieve Executive Producer
Ayush Rajmachikar Additional Voices (voice)
Sawyer Holt Additional Voices (voice)
Ashley London Additional Voices (voice)
Adam Hochstatter Original Music Composer
Sawyer Cole Additional Voices (voice)
Arya Dormiani Additional Voices (voice)
Jude Zarzaur Rowley Jefferson (voice)
Kendrick Owen White Additional Voices (voice)
Aaron Hardy Additional Voices (voice)
Damon Fung Additional Voices (voice)
Ellis Myers Fregley (voice)
Shiloh Phillips Additional Voices (voice)
Jen Cain Additional Voices (voice)
Abhiram Gulati Chirag (voice)
Lila Bahng Patty (voice)
Annika Erickson Kindergarten Mom (voice)
Luther Vue Oversized 4 Year Old (voice)
Enzo Valdez Mikey (voice)
Tunde Oyeneyin Fitness Instructor (voice)
Melrose Additional Voices (voice)
Miabella Rose Additional Voices (voice)
Kyrie Neriah Kennedy Weston (voice)
Livingston McConaughey Student (voice)