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