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)

Gracen Newton

Manny (voice)

Christian Convery

Fregley (voice)

Jessica Mikayla Adams

Braces Girl (voice)

Cyrus Arnold

Teen Driver (voice)

Lossen Chambers

Homeroom Teacher (voice)

Brenda Crichlow

Mrs. Fregley (voice)

Tessa Espinola

Curly-Haired Girl (voice)

Yuvraj Singh

Charles Davies (voice)

Donny Lucas

Mr. Humphreys (voice)

Robert Moloney

Joshie (voice)

Gig Morton

Random Boy (voice)

Mizinga Mwinga

Wizard (voice)

Zeno Robinson

Teen with Baseball Hat (voice)

Gracyn Shinyei

Girl with Ponytail (voice)

Áine Sunderland

Blonde-Haired Girl (voice)

Tristan Allerick Chen

Additional Voices (voice)