Dean DeBlois Director 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 Witless, Toothless, Lightfury Voice Brad Lewis Producer Bonnie Arnold Producer Christopher Sanders Executive Producer John K. Carr Film Editing John Powell Original Music Pierre-Olivier Vincent Production Design Christi Soper Casting