Cast[]
- Lincoln Loud as Hiccup
- Ronnie Anne as Astrid
- Flynn Loud as Stoick
- Rita Loud as Valka
- Kent Mansley (from The Iron Giant) as Drago Bludvist
- Skunk (from Skunk Fu!) as Toothless
- Gumball Watterson (from The Amazing World of Gumball) as Hookfang
- Spike (from My Little Pony: Friendship is Magic) as Stormfly
- Flounder (from The Little Mermaid) & Nemo (from Finding Nemo) as Barf & Belch
- Kion (from The Lion Guard) as Meatlug
- One Eye (from The Dino King) as The Red Death
- Princess Celestia (from My Little Pony: Friendship is Magic) as Cloudjumper
- The Great Prince of the Forest (from Bambi) as Skullcrusher
- Bambi (from Bambi) as Grump
- Speckles (from The Dino King) as Valka's Bewilderbeast
- Sharptooth (from The Land Before Time) as Drago's Bewilderbeast