 | Taylor Lautner als Sharkboy |
 | Taylor Dooley als Lavagirl |
 | Cayden Boyd als Max |
 | David Arquette als Max's Dad |
 | Kristin Davis als Max's Mom |
 | Jacob Davich als Linus / Minus |
 | Sasha Pieterse als Marissa / Ice Princess |
 | George Lopez als Mr. Electricidad / Tobor / Ice Guardian |
 | Rico Torres als Sharkboy's Dad |
 | Marc Musso als Classroom Kid #1 |
 | Shane Graham als Classroom Kid #2 |
 | Tiger Darrow als Classroom Kid #3 |
 | Racer Rodriguez als Sharkboy, Age 7 |
 | Rebel Rodriguez als Sharkboy, Age 5 |
| Rocket Rodriguez als Lug |
 | Robert Rodriguez als Shark (voice) (uncredited) |
 | Araceli González als Principal (uncredited) |
| Peyton Hayslip als Teacher (uncredited) |
| Tania Haddad als Classroom Kid (uncredited) |
| Robert Rodriguez | Editor |
| Nina Proctor | Costume Supervisor |
| Graeme Revell | Music |
| Ermahn Ospina | Makeup Department Head |
| Nina Proctor | Costume Design |
| Joe Rivera | Makeup Artist |
| Marcel Rodriguez | Writer |
| Brian Bettwy | First Assistant Director |
| Howard Berger | Makeup Effects |
| Keefe Boerner | Visual Effects Producer |
| Monika Petrillo | Script Supervisor |
| Ethan Maniquis | Associate Editor |
| Harvey Weinstein | Executive Producer |
| Bill Scott | Line Producer |
| John McLeod | Special Effects Coordinator |
| Robert Rodriguez | Music |
| Elizabeth Avellan | Producer |
| Bob Weinstein | Executive Producer |
| Elspeth Mason | Seamstress |
| Joe Rivera | Hairstylist |
| Jeanette Scott | Set Decoration |
| Robert Rodriguez | Writer |
| Robert Rodriguez | Director of Photography |
| Mary Vernieu | Casting |
| Greg Nicotero | Makeup Effects |
| Jeffrey J. Dashnaw | Stunt Coordinator |
| Robert Rodriguez | Camera Operator |
| Ed Novick | Production Sound Mixer |
| Jeanette Scott | Art Direction |
| John Debney | Music |
| Jay Mahavier | First Assistant Editor |
| Crystal Falkner-Paysse | Set Costumer |
| Tom Proper | Post Production Supervisor |
| Chris Olivia | Pre-Visualization Supervisor |
| Bill Scott | Unit Production Manager |
| Robert Rodriguez | Visual Effects Supervisor |
| David Rimer | Second Assistant Director |
| Jimmy Lindsey | Camera Operator |
| Rico Torres | Still Photographer |
| Albert Aquino | Boom Operator |
| Christopher Stull | Assistant Art Director |
| Rob Simons | Set Designer |
| Cynthia Streit | Production Coordinator |
| Robert Rodriguez | Sound Re-Recording Mixer |
| Tim Rakoczy | Supervising Sound Editor |
| Debbie Cortez Haber | Art Department Coordinator |
| Beth Sepko | Local Casting |
| Shalimar Reodica | Casting Associate |
| Steve Joyner | Art Direction |
| David Hack | Set Decoration |
| Linda A. Borgeson | Executive In Charge Of Post Production |
| Joe McCusker | Construction Coordinator |
| Sandra Condito | Publicist |
| Carl Thiel | Additional Music |
| Sergio Reyes | Sound Re-Recording Mixer |
| Tim Rakoczy | Music Editor |
| Robbie Friedmann | Location Manager |
| Cecil D. Evans | Transportation Coordinator |
| George Oldziey | Additional Music |
| Steve Joyner | Property Master |
| Colin Strause | Visual Effects Supervisor |
| Racer Rodriguez | Story |
| Robert Rodriguez | Director |
| Charles Ewing Smith | Dialogue Editor |
| Bruce Nyznik | Dialogue Editor |
| Troy Robinson | Stunts |
| Troy Brown | Stunts |
