premise: How to Train Your Dragon 2 used real dragons.
hypothesis: How to Train Your Dragon 2 . The film is written and directed by Dean DeBlois , and stars the voices of Jay Baruchel , Gerard Butler , Craig Ferguson , America Ferrera , Jonah Hill , Christopher Mintz-Plasse , T.J. Miller , and Kristen Wiig , with the addition of Cate Blanchett , Djimon Hounsou , and Kit Harington . The entire voice cast from the first film returned , and Cate Blanchett and Djimon Hounsou signed on to voice Valka and Drago , respectively .