Sinopsis
El que es va iniciar com una inesperada amistat entre un jove viking i un temible drac, s’ha convertit en una trilogia èpica. En aquest nou episodi descobriran el seu veritable destí: la llibertat.
Reparto
Jay Baruchel — Hiccup (voice)America Ferrera — Astrid (voice)F. Murray Abraham — Grimmel (voice)Cate Blanchett — Valka (voice)Gerard Butler — Stoick (voice)Craig Ferguson — Gobber (voice)Jonah Hill — Snotlout (voice)Christopher Mintz-Plasse — Fishlegs (voice)Kristen Wiig — Ruffnut (voice)Kit Harington — Eret (voice)Justin Rupple — Tuffnut (voice)Robin Atkin Downes — Ack (voice)Kieron Elliott — Hoark (voice)Julia Emelin — Griselda the Grevious (voice)Gideon Emery — Trapper (voice)Ashley Jensen — Phlegma (voice)AJ Kane — Young Hiccup (voice)Ólafur Darri Ólafsson — Ragnar the Rock (voice)James Sie — Chaghatai Khan (voice)David Tennant — Spitelout / Ivar the Whitless (voice)