- Dave as Hiccup
- Ella as Astrid
- Rodney as Stoick
- Hiro Hamada (from Big Hero 6) as Toothless
- Gwen as Stormfly
- Cody and Country as Barf & Belch
- Owen as Meatlug
- Professor Robert Callaghan (from Big Hero 6) as The Red Death
- Lindy as Cloudjumper
- Duncan as Skullcrusher
- Geoff as Grump
- Tadashi Hamada (from Big Hero 6) as Valka's Bewilderbeast
- Tyler (from Heavy Metal 2000) as Drago's Bewilderbeast
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