Critics Consensus: Exciting, emotionally resonant, and beautifully animated, How to Train Your Dragon 2 builds on its predecessor's successes. How to Train Your Dragon 2 in US Theaters June 13th! Train your own fleet of Dragons in the FREE app game. Hiccup and Toothless explore the island and make a shocking discovery. Will the mysterious Dragon Rider be friend or enemy to the rest of the island? Watch.