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