Brady Noon

Greg Heffley (voice)

Ethan William Childress

Rowley Jefferson (voice)

Hunter Dillon

Rodrick Heffley (voice)

Erica Cerra

Susan Heffley (voice)

Chris Diamantopoulos

Frank Heffley (voice)

Ed Asner

Grandpa Heffley (voice)

Linda Lavin

Barb (voice)

Loretta Devine

Irene (voice)

Priscilla Lopez

Merle (voice)

Nathan Arenas

Mackie (voice)

Albert Tsai

Drew (voice)

Hudson Yang

Larry (voice)

Jimmy Tatro

Bill (voice)

Kimberly Brooks

News Anchor (voice)

Vincent Tong

Leland (voice)

Veena Sood

Elevator Lady (voice)

Ava Acres

Additional Voices (voice)