Brady Noon

Character: Greg Heffley (voice)

Ethan William Childress

Character: Rowley Jefferson (voice)

Hunter Dillon

Character: Rodrick Heffley (voice)

Erica Cerra

Character: Susan Heffley (voice)

Chris Diamantopoulos

Character: Frank Heffley (voice)

Ed Asner

Character: Grandpa Heffley (voice)

Linda Lavin

Character: Barb (voice)

Loretta Devine

Character: Irene (voice)

Priscilla Lopez

Character: Merle (voice)

Nathan Arenas

Character: Mackie (voice)

Albert Tsai

Character: Drew (voice)

Hudson Yang

Character: Larry (voice)

Jimmy Tatro

Character: Bill (voice)

Kimberly Brooks

Character: News Anchor (voice)

Gracen Newton

Character: Manny (voice)

Vincent Tong

Character: Leland (voice)

Veena Sood

Character: Elevator Lady (voice)

Ava Acres

Character: Additional Voices (voice)

Sky Alexis

Character: Additional Voices (voice)

Noah Kaye Bentley

Character: Additional Voices (voice)

Asher Bishop

Character: Additional Voices (voice)

Jen Cain

Character: Additional Voices (voice)

Tristan Allerick Chen

Character: Additional Voices (voice)

Juliet Donenfeld

Character: Additional Voices (voice)

Marley Garner

Character: Additional Voices (voice)

Johnny Gidcomb

Character: Additional Voices (voice)

Lex Lang

Character: Additional Voices (voice)

Michael Leone

Character: Additional Voices (voice)

Ava Mae Leslie

Character: Additional Voices (voice)

Susan Leslie

Character: Additional Voices (voice)

Matt Nolan

Character: Additional Voices (voice)

Andre Robinson

Character: Additional Voices (voice)

Benjamin Valic

Character: Additional Voices (voice)

Paul-Mikél Williams

Character: Additional Voices (voice)

ViviAnn Yee

Character: Additional Voices (voice)

Ruth Zalduondo

Character: Additional Voices (voice)