 | Scott Adsit als Baymax (voice) |
 | Ryan Potter als Hiro Hamada (voice) |
 | Daniel Henney als Tadashi Hamada (voice) |
 | T.J. Miller als Fred (voice) |
 | Jamie Chung als GoGo Tomago (voice) |
 | Damon Wayans Jr. als Wasabi (voice) |
 | Génesis Rodríguez als Honey Lemon (voice) |
 | James Cromwell als Professor Robert Callaghan (voice) |
 | Alan Tudyk als Alistair Krei (voice) |
 | Maya Rudolph als Aunt Cass (voice) |
 | Abraham Benrubi als General (voice) |
 | Katie Lowes als Abigail (voice) |
 | Billy Bush als Newscaster (voice) |
 | Daniel Gerson als Desk Sergeant (voice) |
 | Paul Briggs als Yama (voice) |
 | Charlie Adler als Yokai (voice) |
 | Marcella Lentz-Pope als Additional Voices (voice) |
 | David Shaughnessy als Heathcliff (voice) |
 | Cam Clarke als Additional Voice (voice) |
 | Nicholas Guest als Additional Voice (voice) |
 | Terri Douglas als Additional Voice (voice) |
 | Tim Mertens als Additional Voice (voice) |
 | Yuri Lowenthal als Additional Voice (voice) |
 | Sundra Oakley als Additional Voice (voice) |
 | Brian R. Norris als Additional Voice (voice) |
 | Stan Lee als Fred's Dad (voice) |
 | Shane Sweet als Additional Voice (voice) |
 | Frank Welker als Mochi (voice) (uncredited) |
 | David Cowgill als Additional Voice (voice) |
 | Kirk Baily als Additional Voice (voice) |
 | Charlotte Gulezian als Ringleader (voice) |
 | Reed Buck als Additional Voice (voice) |
 | Roy Conli als Additional Voice (voice) |
 | Cooper Cowgill als Additional Voice (voice) |
 | Jackie Gonneau als Additional Voice (voice) |
 | Marlie Crisafulli als Additional Voice (voice) |
 | Bridget Hoffman als Additional Voice (voice) |
 | Kelly Hoover als Additional Voice (voice) |
| Leah Latham als Additional Voice (voice) |
 | James Taku Leung als Additional Voice (voice) |
 | Yumi Mizui als Additional Voice (voice) |
 | Michael Powers als Additional Voice (voice) |
| Lynwood Robinson als Additional Voice (voice) |
 | Josie Trinidad als Additional Voice (voice) |
 | Daniel Howell als Male Technician #1 (voice) (uncredited) |
 | June Christopher als Additional Voices (voice) |
 | Phil Lester als Male Technician #1 (voice) (uncredited) |
| Roy Conli | Producer |
| John Lasseter | Executive Producer |
| Jang Chol Lee | Visual Development |
| Robert L. Baird | Story |
| Joseph Mateo | Story |
| Tim Mertens | Editor |
| Kristina Reed | Co-Producer |
| Daniel Gerson | Screenplay |
| Duncan Rouleau | Characters |
| Steven T. Seagle | Characters |
| Henry Jackman | Original Music Composer |
| Robert L. Baird | Screenplay |
| Jamie Sparer Roberts | Casting |
| Bradford Simonsen | Associate Producer |
| Jordan Roberts | Screenplay |
| Paul A. Felix | Art Direction |
| Mitja Rabar | Animation |
| Jeff Williams | Animation |
| Pamela Ribon | Thanks |
| Lisa Lassek | Additional Editing |
| Cymbre Walk | Casting Associate |
| Andrew Kinney | Orchestrator |
| Jeff Turley | Visual Development |
| Gabriel Guy | Sound Re-Recording Mixer |
| David E. Fluhr | Sound Re-Recording Mixer |
| Eliot Milbourn | Color Timer |
| Nia Hansen | Sound Effects Editor |
| David C. Hughes | Sound Effects Editor |
| Blair Bradley | Special Effects Coordinator |
| Terri Douglas | ADR Voice Casting |
| Kim Foscato | Supervising Dialogue Editor |
| Jeremy Bowker | Sound Effects Editor |
| Rob Dressel | Director of Photography |
| Chris Chae | Sound Recordist |
| Addison Teague | Sound Effects Editor |
| Daniel Laurie | Supervising ADR Editor |
| Jin Kim | Character Designer |
| Marc Smith | Story Artist |
| Matsune Suzuki | Layout |
| Chris Williams | Director |
| Rick Moore | Layout |
| Kendra Vander Vliet | Layout |
| Don Hall | Director |
| Joe Kelly | Characters |
| Joe Casey | Characters |
| Aaron Adams | Technical Supervisor |
