The end of "Game of Thrones" has been in the works for longer than you might have realized.

Now that the cast and producers are hyping the hit show's eighth and final season, we're learning a lot of interesting information. Brazil's São Paulo Expo drew the show's creators, David Benioff and Dan Weiss, along with stars Maisie Williams (Arya Stark) and John Bradley (Samwell Tarly). While they were there, they not only unveiled the first teaser, they offered new tidbits, including when Benioff and Weiss decided how to end the show.

It was Williams who asked the showrunners-slash-creators the question about the end of "Game of Thrones."

"Out of genuine curiosity, when did you first figure out how you would end 'Game of Thrones'?" she asked, per the show's Twitter account.

Their response revealed that they came up with their idea quite some time ago. In fact, the answer came between Season 3 and 4, which could have been as early as 2012 or possibly 2013.

"Sometime after we finished the third season is when we knew," they told Williams.

Since Benioff and Weiss came up with their ending, they've brought us four more seasons. The last one, Season 8, will consist of just six episodes, but they'll reportedly extra long ones. Fans, of course, are both sad and eager to see the conclusion unfold.

"Game of Thrones" Season 8 premieres in April on HBO.

[via: Game of Thrones/Twitter]