'How to Train Your Dragon 2' adds Cate Blanchett, Kit Harinton, Djimon Hounsou

Dreamworks Animations upcoming "How to Train Your Dragon 2" had added three members to its voice cast, including "Game of Thrones" actor Kit Harington.

The first film was released in 2010.

As Entertainment Weekly reports, Dreamworks announced today (Thursday) at Comic Con that Harington, Cate Blanchett ("The Hobbit" and Djimon Hounsou ("Gladiator") have joined the animated sequel.

Additionally, writer/director Dean DeBlois gave new story details about the film, which will follow Hiccup (voiced by Jay Baruchel) and his viking village as they begin to explore their world further with the help of their new dragon allies, including, of course, the Night Fury Toothless.

They soon discover a people who have enslaved dragons rather than partnering with them and are creating an army to conquer their neighbors.

According to EW's report, Hounsou plays the invading army's leader, while Harington plays a dragon trapper. Blanchett, meanwhile, will voice a vigilante who is trying to free the enslaved dragons.

Storyboarding underway for 'How to Train Your Dragon 2'

Storyboarding has begun on the sequel to the Academy Award-nominated film "How to Train Your Dragon."

The first film hit theaters March 26, 2010.

The Hollywood Reporter's Heat Vision blog quoted writer/director Dean DeBlois talking about the progress made so far on the sequel, which is set for release on June 20, 2014.

“There are certain characters and situations that come into play in the second film that will becomes much more crucial to the story by the third. Other threads from the first will begin to pay themselves off in the second,” DeBlois said. “It's my way of guaranteeing that it is not another adventure that we throw the same five or six characters into, that it feels like part of a larger story.”

He went on to say storyboarding is underway after the completion of several drafts of the script.

The first film was loosely based on the first installment in author Cressida Cowell's nine-book series of the same name. Since the movie departed rather significantly from the book, it's expected the sequel will do as well.

"How To Train Your Dragon" made my top five list films of 2010 list, and remains one of my favorite animated films of recent years. The film went on to earn two Academy Award nominations for Best Animated Feature and Best Original Score.