HBO has announced that it's ordered two additional seasons of Game of Thrones, which just started its fourth season this past Sunday. It makes sense, as the show was recently recognized as the most torrented television show out there, proving its popularity. Even with the rampant piracy, the season 3 finale was seen by over 5 million people.

If you didn't realize, Game of Thrones is based on A Song of Ice and Fire by George R.R. Martin. It's comprised of five books, which two more to come. This means that Game of Thrones producers have plenty of content to pull from. In fact, Game of Thrones seasons 3 and 4 are based on Storm of Swords, the third novel in the series.

"Game of Thrones is a phenomenon like no other," said Michael Mobardo, president of HBO programming. "David Benioff and D.B. Weiss, along with their talented collaborators, continue to surpass themselves, and we look forward to more of their dazzling storytelling."

The Game of Thrones season 4 premier garnered 6.6 million viewers. To put that into perspective, that is the most-viewed HBO show since the last episode of The Sopranos brought in 12 million viewers in 2007. Game of Thrones is expected to have a 7 or 8 season run when all is said and done.