Terrible Terror training competition leads to a heated rivalry between Fishlegs and Snotlout, allowing Alvin to kidnap Meatlug. The kids must use their newly trained Terrors to rescue their friend.
America Ferrera Astrid
Christopher Mintz-Plasse Fishlegs
Mark Hamill Alvin the Treacherous
Jay Baruchel Hiccup Horrendous Haddock III
T.J. Miller Tuffnut
Zack Pearlman Snotlout