AceShowbiz - The third and final installment of "How to Train Your Dragon" has unveiled its first trailer. The new footage offers insight into the upcoming movie which sees the final adventure of older Hiccup and his dragon Toothless.

The trailer of "How to Train Your Dragon: The Hidden World" opens with Toothless discovering a Light Fury, a female of Night Fury which is able to teleport through thei plasma blasts. Along with Astrid, Hiccup and Toothless later find themselves getting mind-blown by the hidden dragon world in which the Light Fury appears to live.

With the instruction from Hiccup, Toothless is seen trying to flirt to the lady dragon. Though the flirting doesn't seem to work well at the beginning, the two dragons grow closer later. "Toothless has a girlfriend," Astrid exclaims.

But the world is not about sunshine and rainbows as someone threatens to hunt every single dragon left. Alongside other Vikings and the dragons, he fights the bad guy in an epic fiery battle. "We have to fight for their freedom!" Hiccup says in front of the crowd.

The trailer also indicates that Toothless is not going to be the only having a girlfriend in the movie. At one point, Astrid, on whom Hiccup has been crushing for a long time, can be seen linking her arms to him.

The movie features returning actors, including Jay Baruchel as Hiccup, Cate Blanchett as Valka, Craig Ferguson as Gobber the Belch and America Ferrera as Astrid Hofferson. Dean DeBlois once again directs and writes the movie with Bonnie Arnold and Brad Lewis producing.

"How to Train Your Dragon: The Hidden World" arrives in U.S. theaters in spring 2019.