Noah Schnapp

Charlie Brown (voice)

Bill Melendez

Snoopy / Woodstock (voice) (archive sound)

Marleik 'Mar Mar' Walker

Franklin Armstrong (voice)

Alex Garfin

Linus (voice)

Hadley Belle Miller

Lucy van Pelt (voice)

Rebecca Bloom

Marcie (voice)

Anastasia Bredikhina

Patty (voice)

Venus Schultheis

Peppermint Patty (voice)

A.J. Tecce

Pigpen (voice)

Mariel Sheets

Sally Brown (voice)

Noah Johnston

Schroeder (voice)

William Wunsch

Shermy (voice)

Madisyn Shipman

Violet Grey (voice)

Kristin Chenoweth

Fifi (voice)

Trombone Shorty

Miss Othmar / Mrs. Little Red-Haired Girl (voice)

Francesca Capaldi

The Little Red-Haired Girl / Frieda (voice)

Holly Dorff

Various Voices (voice)

Al Nelson

Various Voices (voice)

Tessa Netting

Various Voices (voice)

Randy Thom

Various Voices (voice)

Gwendolyn Yates Whittle

Various Voices (voice)

Νικόλας Μπράβος

Group Voices (voice)

Sam Lavagnino

Group Voices (voice)

Dylan Naber

Group Voices (voice)

Aramé Scott

Group Voices (voice)