How to Train Your Dragon has grown up in more ways than one. The sequel to the original animated charmer takes place five years later, and it's filled with vast and stunning landscapes, even more endlessly inventive dragons, and a more mature story. Despite a few hiccups in its plot, it's a movie to make hearts soar.

How do you make a sequel to a movie as charming as How to Train Your Dragon? In our exclusive interview, the director, producer, and actors of How to Train Your Dragon 2 tell us about teenaged Hiccup, how he'll see a dark version of himself in the sequel, and the importance of telling the adult characters' stories,…