 | Jay Baruchel als Hiccup (voice) |
 | Cate Blanchett als Valka (voice) |
 | Gerard Butler als Stoick (voice) |
 | Craig Ferguson als Gobber (voice) |
 | America Ferrera als Astrid (voice) |
 | Jonah Hill als Snotlout (voice) |
 | Christopher Mintz-Plasse als Fishlegs (voice) |
 | T.J. Miller als Tuffnut (voice) |
 | Kristen Wiig als Ruffnut (voice) |
 | Djimon Hounsou als Drago (voice) |
 | Kit Harington als Eret (voice) |
 | Kieron Elliott als Hoark the Haggard (voice) |
 | Philip McGrade als Starkard (voice) |
 | Andrew Ableson als Ug (voice) |
 | Gideon Emery als Teeny (voice) |
 | Simon Kassianides als No-Name (voice) |
 | Randy Thom als Toothless (voice) |
| Dean DeBlois | Director |
| John Swanson | Production Manager |
| Nicolas Weis | Visual Effects Design Consultant |
| Bonnie Arnold | Producer |
| John K. Carr | Editor |
| Dean DeBlois | Writer |
| Chris Sanders | Executive Producer |
| John Powell | Original Music Composer |
| Leslee Feldman | Casting |
| Dean DeBlois | Executive Producer |
| Christi Soper Hilt | Casting |
| James Baxter | Animation Supervisor |
| Michael A. Connolly | Co-Producer |
| Roy Lee | Co-Producer |
| Aaron Dem | Associate Producer |
| Doug Davison | Co-Producer |
| Kate Spencer | Co-Executive Producer |
| Kendra Haaland | Co-Producer |
| Rodrigo Blaas | Other |
| Guillermo del Toro | Thanks |
| Drew Struzan | Thanks |
| Kevin Andrus | Animation |
| J.C. Alvarez | Layout |
| Jeremy Bowker | Sound Effects Editor |
| James Beshears | Editorial Services |
| Bill Diaz | Animation |
| Alexander Rybak | Music |
| Brent Hutchins | Production Controller |
| Joe Bowers | Animation |
| Liron Topaz | Animation |
| David Drell | Creature Technical Director |
| Jessica Drake | Dialect Coach |
| Elmer Quinteros | Editorial Production Assistant |
| Dorien Gunnels | Lighting Artist |
| Kirill Smolskiy | Lighting Artist |
| Robert Vignone | Modeling |
| Owen Slade | Musician |
| Ken Bielenberg | Executive In Charge Of Production |
| Adam Dotson | Animation |
| Tal Shwarzman | Animation |
| Theodore Anthony Lee Ty | Animation |
| Tony Siruno | Character Designer |
| Kevin Rodgers | Creature Technical Director |
| Paul Mounsey | Additional Music |
| Andrew Findon | Musician |
| Gary Kettel | Musician |
| Betty Tom | Production Accountant |
| Michael Amos | Animation |
| Julien Bocabeille | Animation |
| Lou Dellarosa | Animation |
| Rachel Fite | Animation |
| Mark A. Hester | Associate Editor |
| Liang-Yuan Wang | CG Supervisor |
| James E. Stapp | Modeling |
| Mark Berrow | Musician |
| Chris Hewitt | Post Production Assistant |
| Corie Zhang | Production Coordinator |
| Leo Sanchez Barbosa | Character Designer |
| Nathan Loofbourrow | Creature Technical Director |
| Kendal Sager | Creature Technical Director |
| Jabari Phillips | Editorial Coordinator |
| Sean England | Foley |
| Pete Anthony | Orchestrator |
| Andrea McCarthy Paul | Production Accountant |
| Sumit Verma | Production Coordinator |
| Tripp Hudson | Executive In Charge Of Production |
| Andrew Harkins | Animation |
| Martin P. Hopkins | Animation |
| Joe Moshier | Character Designer |
| Dick Walsh | Creature Technical Director |
| Dee Lewis Clay | Musician |
| Jonathan Ciscon | Lighting Artist |
| Bert Poole | Lighting Supervisor |
| Craig Dowsett | Modeling |
| Thomas A. Carlson | Music Editor |
| Stephen Henderson | Musician |
| Andrew Kinney | Orchestrator |
| John Geller | Post Production Assistant |
| Leff Lefferts | Sound Design Assistant |
| Michelle Cowart | Animation |
| David Polk | Animation |
| Cliff B. Mitchell | Creature Technical Director |
| Wade Ryer | Creature Technical Director |
| Terri Anderson | Finance |
| Pascal Garneau | Foley Editor |
| Max Bruce | Lighting Supervisor |
| Leff Lefferts | Additional Sound Re-Recording Mixer |
| Zhaoping Wei | Art Direction |
| Cassidy Curtis | Animation |
| Dug Stanat | Creature Technical Director |
| Ruhi Sinha | Lighting Artist |
| Andrew Wood | Musician |
| Tommy Laurence | Orchestrator |
| John Ashton Thomas | Orchestrator |
| David Farley | Post Production Supervisor |
| Aubrey Millen | Production Coordinator |
| Louis Flores | VFX Artist |
| Nathan Crommett | Finance |
| Brian Chumney | ADR Supervisor |
| Sue Fox | Foley Editor |
| Thomas Grummt | Lead Animator |
| Tom Pigott-Smith | Musician |
| Randy Kerber | Orchestrator |
| Jacquelyn Robbins | Production Accountant |
| Michael Necci | Art Direction |
| Nayoun Charoenchai | Animation |
| Alberto Corral | Animation |
| Shane Glick | Assistant Editor |
| Li-Lian Ku | Creature Technical Director |
| K L Sateesh Varma | Compositors |
| Paul Kimber | Musician |
| Mary Scully | Musician |
| Dave Metzger | Orchestrator |
| Tim Kwan | Production Coordinator |
| Tyler M. Saunders | Production Coordinator |
| Alissa Rowinsky Wright | Legal Services |
| Bart Coughlin | Creature Technical Director |
| Lauren Lear | First Assistant Editor |
| Tom Kramer | Music Editor |
| Lorne MacDougall | Musician |
| Anna Noakes | Musician |
| James Thatcher | Musician |
| Lillian Ritchie | Production Coordinator |
| Tommie Löfqvist | Animation |
| Nico Marlet | Character Designer |
| Daniel Dawson | Creature Technical Director |
| Hongseo Park | Creature Technical Director |
| Ferris Webby | Creature Technical Director |
| Ariga Parseghian | Finance |
| John Barclay | Musician |
| Jeff Atmajian | Orchestrator |
| Ryan Behnke | Production Coordinator |
| Grace Bisel | Administration |
| Pierre-Olivier Vincent | Production Design |
| Gaurav Shenai | Creature Technical Director |
| Robin Harlan | Foley |
| Kaki Bage | Lighting Production Assistant |
| Stephen Bailey | Sequence Supervisor |
| Charles Ellison | Modeling |
| Paul Schoeni | Modeling |
| Andrew Busher | Musician |
| Rick Giovinazzo | Orchestrator |
| Laurent Caneiro | Animation |
| Rani Naamani | Animation |
| Zakk Bates | Animation |
| Gavin Greenaway | Conductor |
| Joanna Wu | Lighting Supervisor |
| Shawn Murphy | Mixing Engineer |
| Marty Havran | Modeling |
| Sudipta Panja | Modeling |
| Jason Evans | Musician |
| Curtis W. Thompson | Production Coordinator |
| Leif Jeffers | Animation |
| Trisha Butkowski | Creature Technical Director |
| Jaryd Snover | Creature Technical Director |
| Ariel Chisholm | Lighting Artist |
| Hannah Sherman | Lighting Artist |
| Vaibhav Shah | Modeling |
| Jessica Forer | Production Coordinator |
| Deepak Kumar | Production Coordinator |
| Dustin Wheelen | Production Coordinator |
| Elmer Quinteros | Animation Production Assistant |
| Jennifer E. Harlow | Animation |
| Christina N. de Juan | Creature Technical Director |
| Anthony B. Willis | Additional Music |
| Christopher Sprunger | Lighting Artist |
| Jayanta Mazumder | Modeling |
| Frank Ricotti | Musician |
| Alex Cardullo | Post Production Assistant |
| Stephanie Alpert | Production Coordinator |
| Kristen Murtha | Production Coordinator |
| Ron Pucherelli | Animation |
| Mike Stern | Animation |
| Greg Whittaker | Animation |
| Sebastien Wojda | Animation |
| Mollie Gamo | Casting Associate |
| Candice Miller | Creature Technical Director |
| Milton E. Rodriguez-Rios | Lighting Artist |
| Steve Mair | Musician |
| Caroline Robinson | Production Supervisor |
| Sean Sexton | Supervising Animator |
| Terry Kaleas | VFX Artist |
| Rahul Mullick | VFX Artist |
| Desiree Montalvo | Visual Effects Coordinator |
| Guoqiang Xie | VFX Artist |
| Beth Hofer | Executive In Charge Of Production |
| Angie Howard | Production Manager |
| Aditya Deosthale | Production Supervisor |
| David Hail | Publicist |
| Nick Wollage | Score Engineer |
| Rain Angeles | Systems Administrators & Support |
| Shiben Bhattacharjee | VFX Artist |
| Ben Sutherland | VFX Artist |
| Munira Moiz Tayabji | Supervising Technical Director |
| Dustin Anderson | VFX Artist |
| Christopher Rydalch | VFX Artist |
| Stephen Timothy Cooney | VFX Artist |
| Margaret A. Decker | Software Engineer |
| Ted Davis | Visual Effects |
| Carl Hooper | VFX Artist |
| Al Nelson | Sound Designer |
| Mac Smith | Sound Effects Editor |
| Jennifer Smith | Software Engineer |
| Jakob Hjort Jensen | Supervising Animator |
| Wes Chilton | VFX Artist |
| David Lipton | VFX Artist |
| Bonnie Lemon | Executive In Charge Of Production |
| Darci Zalvin | Executive In Charge Of Production |
| Joe Crowley | Production Supervisor |
| Fangwei Lee | Visual Effects |
| Jaideep Khadilkar | VFX Artist |
| Andrew Wheeler | VFX Artist |
| Steven Schweickart | Production Supervisor |
| Randy Thom | Sound Re-Recording Mixer |
| Steve Jamerson | Sound Engineer |
| Linda Sunshine | Thanks |
| Jeff Budsberg | Visual Effects |
| Brandon Proctor | ADR & Dubbing |
| Mark Macready | Systems Administrators & Support |
| Milind D. Shinde | Production Manager |
| Stephen J. Ward | Software Engineer |
| Steven Hornby | Supervising Animator |
| David Torres | Supervising Animator |
| Brian C. Davis | VFX Artist |
| Stephanie Mulqueen | VFX Artist |
| Youxi Woo | VFX Artist |
| Rachnatp | Production Supervisor |
| Kevin Estrada | Still Photographer |
| Kristof Serrand | Supervising Animator |
| Alan Cheney | VFX Artist |
| Katie Van Maanen | VFX Artist |
| Dinesh Krishnan Nair | Production Manager |
| Cat Thelia | Production Supervisor |
| Michael Silvers | Supervising Sound Editor |
| Bart Feliciano | Systems Administrators & Support |
| Anthony Fung | VFX Artist |
| Sean Cole | Visual Effects Supervisor |
| Rebecca Huntley | Production Manager |
| Tracy Larson | Production Supervisor |
| Randy Thom | Supervising Sound Editor |
| Rachel Bolt | Musician |
| Jason Porath | VFX Artist |
| Simon Goldfinch | Sound Engineer |
| Zach Glynn | VFX Artist |
| Matt Head | VFX Artist |
| Shane Mulholland | Production Supervisor |
| Dan Golembeski | Supervising Technical Director |
| Dave Walvoord | Visual Effects Supervisor |
| Gil Zimmerman | Director of Photography |
| Simon Otto | Storyboard Artist |
| Fabio Lignini | Supervising Animator |
| Cressida Cowell | Book |
