Greg Heffley (voice)

Brady Noon

Frank Heffley (voice)

Chris Diamantopoulos

Rowley Jefferson (voice)

Ethan William Childress

Fregley (voice)

Christian Convery

Rodrick Heffley (voice)

Hunter Dillon

Susan Heffley (voice)

Erica Cerra

Manny (voice)

Gracen Newton

Mr. Underwood (voice)

Billy Lopez

Braces Girl (voice)

Jessica Mikayla Adams

Joshie (voice)

Robert Moloney

Teen Driver (voice)

Cyrus Arnold

Teen with Mullet (voice)

Braxton Baker

Homeroom Teacher (voice)

Lossen Chambers

Mrs. Fregley (voice)

Brenda Crichlow

Curly-Haired Girl (voice)

Tessa Espinola

Charlie Davies (voice)

Yuvraj Kalsi

Charles Davies (voice)

Yuvraj Singh

Mr. Humphreys (voice)

Donny Lucas

Chirag Gupta (voice)

Veda Maharaj

Holly Hills’s Friend (voice)

Jaime Maclean

Random Boy (voice)

Gig Morton

Wizard (voice)

Mizinga Mwinga

Hulking Teen (voice)

John Omohundro

Teen with Baseball Hat (voice)

Zeno Robinson

Girl with Ponytail (voice)

Gracyn Shinyei

Blonde-Haired Girl (voice)

Áine Sunderland

Additional Voices (voice)

Jen Cain

Additional Voices (voice)

Tristan Allerick Chen

Additional Voices (voice)

Jordyn Curet

Additional Voices (voice)

Johnny Gidcomb

Additional Voices (voice)

Caleb Jeon

Additional Voices (voice)

Susan Leslie

Additional Voices (voice)

Iara Nemirovsky

Additional Voices (voice)

Matt Nolan

Additional Voices (voice)

Andre Robinson

Additional Voices (voice)

Carter Sand

Additional Voices (voice)

Lily Rose Silver

Additional Voices (voice)

Brooke D. Singleton

Additional Voices (voice)

Benjamin Valic

Additional Voices (voice)

ViviAnn Yee

Additional Voices (voice)

Julian Zane