故事发生在前部的五年之后，赛龙比赛已成为岛上最受欢迎的一项运动，男女主人公小嗝嗝与阿斯特丽德驾着自己的龙开始探索未知的世界。他俩发现自己已卷入一场战争的中心地带，必须率领族人捍卫这片土地的平静。
Jay Baruchel
Hiccup (voice)
Cate Blanchett
Valka (voice)
Gerard Butler
Stoick (voice)
Craig Ferguson
Gobber (voice)
America Ferrera
Astrid (voice)
Jonah Hill
Snotlout (voice)
Christopher Mintz-Plasse
Fishlegs (voice)
T.J. Miller
Tuffnut (voice)
Kristen Wiig
Ruffnut (voice)
Djimon Hounsou
Drago (voice)
Kit Harington
Eret (voice)
Kieron Elliott
Hoark the Haggard (voice)
Philip McGrade
Starkard (voice)
Andrew Ableson
Ug (voice)
