 | Noah Schnapp als Charlie Brown (voice) |
 | Bill Melendez als Snoopy / Woodstock (voice) (archive sound) |
 | Marleik 'Mar Mar' Walker als Franklin Armstrong (voice) |
 | Alex Garfin als Linus (voice) |
 | Hadley Belle Miller als Lucy van Pelt (voice) |
 | Rebecca Bloom als Marcie (voice) |
 | Anastasia Bredikhina als Patty (voice) |
 | Venus Schultheis als Peppermint Patty (voice) |
 | A.J. Tecce als Pigpen (voice) |
 | Mariel Sheets als Sally Brown (voice) |
 | Noah Johnston als Schroeder (voice) |
 | William Wunsch als Shermy (voice) |
 | Madisyn Shipman als Violet Grey (voice) |
 | Kristin Chenoweth als Fifi (voice) |
 | Micah Revelli als Little Kid (voice) |
 | Trombone Shorty als Miss Othmar / Mrs. Little Red-Haired Girl (voice) |
 | Francesca Capaldi als The Little Red-Haired Girl / Frieda (voice) |
 | Holly Dorff als Various Voices (voice) |
| Kelly Michele Mills als Various Voices (voice) |
 | Al Nelson als Various Voices (voice) |
 | Tessa Netting als Various Voices (voice) |
 | Randy Thom als Various Voices (voice) |
 | Randy Trager als Various Voices (voice) |
 | Gwendolyn Yates Whittle als Various Voices (voice) |
| Gia Bravos als Group Voices (voice) |
| Ileanna Bravos als Group Voices (voice) |
 | Nikolas Bravos als Group Voices (voice) |
| Clayton Drier als Group Voices (voice) |
| Kori Elmore als Group Voices (voice) |
| Adam Joshua Jastrow als Group Voices (voice) |
| Frances Bella Kayser als Group Voices (voice) |
| Theodore F. Kayser als Group Voices (voice) |
| Ava Kramer als Group Voices (voice) |
 | Sam Lavagnino als Group Voices (voice) |
| Ava Mae Leslie als Group Voices (voice) |
| Jaiden A. M. Mathews als Group Voices (voice) |
| Terence Matthews II als Group Voices (voice) |
 | Dylan Naber als Group Voices (voice) |
| Marley Pearson als Group Voices (voice) |
 | Aramé Scott als Group Voices (voice) |
| Eden Vietro als Group Voices (voice) |
| Nicole Wedel als Group Voices (voice) |
| Allen Zyler als Group Voices (voice) |
| Steve Martino | Director |
| Charles M. Schulz | Characters |
| Bryan Schulz | Writer |
| Dan Haring | Lighting Artist |
| Cornelius Uliano | Screenplay |
| Craig Schulz | Screenplay |
| Randy Trager | Editor |
| Paul Feig | Producer |
| Bryan Schulz | Producer |
| Cornelius Uliano | Producer |
| Christian Kaplan | Casting |
| Nash Dunnigan | Art Direction |
| Craig Schulz | Producer |
| Renato Falcão | Director of Photography |
| Michael J. Travers | Producer |
| Christophe Beck | Original Music Composer |
| Motoko Wada | Visual Development |
| Andrew Atteberry | Animation |
| Dave Vasquez | Animation |
| David Crispino | Animation |
| Elena Ortego | Animation |
| Jason Ho | Animation |
| Jeremy Lazare | Animation |
| Matthew Hasselmann | Animation |
| Pete Devlin | Animation |
| Ricky Renna | Animation |
| Sikand Srinivas | Animation |
| Tansal Arnas | Schedule Coordinator |
| Holly Dorff | ADR Voice Casting |
| Scott Farrell | Animation |
| Jess Morris | Animation |
| Theresa Adolph | Animation |
| Jamie Branquinho | Apprentice Sound Editor |
| Louis Jones | Animation |
| Tab Burton | Animation |
| Cheryl Nardi | ADR Editor |
| Jamie Giger | Animation |
| Nathan Dillow | Animation |
| Todd Elliott | Animation |
| Edward Fornoles | Animation |
| Dan Segarra | Animation |
| Eric Burnett | Animation |
| Ken Huling | Animation |
| Mark Tan | Animation |
| Tyler Kakac | Animation |
| Brock Boyts | Animation |
| Tom Grevera | Animation |
| Gina Grasso | Assistant Production Manager |
| Ken Fountain | Animation |
| Seth Hippen | Animation |
| Randy Thom | Supervising Sound Editor |
| Emanuele Pavarotti | Animation |
| Louaye Moulayess | Animation |
| Michael Berardini | Animation |
| Richard A. Fournier | Animation |
| Ryan Vicik | Animation |
| Wira Winata | Animation |
| Tim Davies | Conductor |
| Brian Raschko | Animation |
| Eric Anderson | Animation |
| Julen Santiago | Animation |
| Randy Thom | Sound Re-Recording Mixer |
| Leo Birenberg | Additional Music |
| Cristin McKee | Animation |
| Eric Chou | Animation |
| Ken Kaiser | Animation |
| Lisa Allen | Animation |
| Pako Bagur | Animation |
| Joshua Spencer | Production Supervisor |
| Zach Robinson | Additional Music |
| Adam Strick | Animation |
| Amila Puhala | Animation |
| Carolyn Ee-Kaiser | Animation |
| David Nasser | Animation |
| Justin Weg | Animation |
| Tingting Liu | Animation |
| Richard Gould | Assistant Sound Editor |
| Tim Davies | Orchestrator |
| A.J. Conrad | Animation |
| Christopher D. Williams | Animation |
| Glen Young | Animation Department Coordinator |
| Christopher Silva | Animation |
| Eric Prah | Animation |
| Graham Silva | Animation |
| Joerg Volk | Animation |
| Lauren Wells | Animation |
| Cheryl Nardi | Dialogue Editor |
| Patrick Giusiano | Animation |
| Stephen Dahler | Animation |
| Wee Brian | Animation |
| Hector Godoy Garcia | Animation |
| Jin Kum | Animation |
| Patrik Puhala | Animation |
| Trevor Young | Animation |
| Wes Storhoff | Animation |
| Daniel Ible | Assistant Editor |
| Lorry Ann Shea | Assistant Production Manager |
| Angel Camacho-Torres | Visual Effects |
| Douglas Seiden | Visual Effects |
| David V. Mei | Character Modelling Supervisor |
| Jim Passon | Color Timer |
| Kimberly Patrick | Foley Editor |
| Joe Bonomo | Systems Administrators & Support |
| Dan Seddon | Character Designer |
| José Manuel Fernández Oli | Character Designer |
| Morgan C. Griffiths | Compositors |
| Sophia Ohara | Editorial Coordinator |
| Krzysztof Fus | Modeling |
| Lora Hirschberg | Sound Re-Recording Mixer |
| Jeremy Oborn | Visual Effects |
| Nikki Tomaino | Visual Effects |
| Micah Dahlberg | Casting Associate |
| Ferris Webby | Creature Technical Director |
| Joseph Antonuccio | Lead Animator |
| Dinis 'Dennis' Morais | Modeling |
| Ramón López Seco de Herrera | Modeling |
| David Benoit | Musician |
| Sangjun Lee | Character Designer |
| Richard Aponte | VFX Artist |
| Ignacio Barrios | Visual Effects |
| Matthew Doble | Visual Effects |
| Paul Ohrt | Executive In Charge Of Production |
| Anthony Nisi | Production Manager |
| Dmitri Makarov | Sound Effects Editor |
| Scott Carroll | Supervising Animator |
| Fernand Bos | Supervising Music Editor |
| Christopher Moore | Technical Supervisor |
| Scott Carroll | Visual Effects |
| Jeff Gabor | Lead Animator |
| Lluis Llobera | Lead Animator |
| Lauren Conway Weber | Production Coordinator |
| Kristine Familletti | Schedule Coordinator |
| Joe Garten | Sound Editor |
| Justine Baker | Sound Recordist |
| Kevin Estrada | Still Photographer |
| Stephen Gressak | Visual Effects |
| Joshua Rivas | Digital Compositors |
| Ed Corcoran | Production Coordinator |
| Carrie Perry | Schedule Coordinator |
| Jeremy Bowker | Sound Effects Editor |
| Leff Lefferts | Sound Re-Recording Mixer |
| Gwendolyn Yates Whittle | Supervising Sound Editor |
| Sabine Heller | Visual Effects |
| Jonathan Lin | Modeling |
| Katie Hasleham | Producer |
| Kristin Catuogno | Sound Recordist |
| Sean England | Foley |
| Kevin Ricard | Musician |
| Laurel Elmendorf | Production Accountant |
| Casey Stone | Scoring Mixer |
| Andrew Beddini | Technical Supervisor |
| Cleveland Hibbert | Visual Effects |
| James Gu | Creature Technical Director |
| Amy Pawlowski | Digital Intermediate |
| Terry Wilson | Music Editor |
| John Houlihan | Music Supervisor |
| Kevin Axt | Musician |
| Francesco Giroldini | Painter |
| Patrick Worlock | Production Supervisor |
| Rosalinda Malibiran | VFX Artist |
| Alen Lai | Visual Effects |
| Jason Sadler | Character Designer |
| Jake Albers | Compositors |
| Christian Haniszewski | Creature Technical Director |
| Harald Kraut | Layout |
| Steve Vanseth | Lead Animator |
| Tom Rizzo | Musician |
| Kyle Milardo | Production Coordinator |
| Mac Smith | Sound Effects Editor |
| Nick Bruno | Supervising Animator |
| Julia Correnti | Compositors |
| Jorge Lucas | Editorial Production Assistant |
| William Battaglia | First Assistant Editor |
| Ronni Brown | Foley |
| Harald G. Kraut | Layout |
| Raymond Ross | Lead Animator |
| Wade Culbreath | Musician |
| Justin Leach | Rigging Supervisor |
| Daniel Patrick O'Brien | Sequence Leads |
| Jon Townley | Visual Effects |
| Ashleigh Abramovich | Compositors |
| Claudio Gonzalez | Digital Compositors |
| Ted Caplan | Music Editor |
| Eric Bradley | Musician |
| Helen Z. Altenbach | Musician |
| James Thatcher | Musician |
| Jeremy Levy | Orchestrator |
| Alexis Jallad | Production Accountant |
| Hunter Berk | Sound Recordist |
| Jean Schulz | Thanks |
| Aimee Johnson | Visual Effects |
| Christopher M.K. Hill | Creature Technical Director |
| Jason Fricchione | Editorial Manager |
| Randy Kerber | Musician |
| Michael Daley | Story Artist |
| Moroni Taylor | Story Artist |
| Michael Tanzillo | Visual Effects |
| Randy Thom | Sound Designer |
