Benioff and Weiss will also direct the final season, HBO said.
Although the final release date for Game of Thrones season 8 is not yet revealed, the fans couldn't stop building their own theories.
The final season of the show is currently in production so there will be plenty of time to try to spoil how it all shakes out between now and then.
HBO has announced that the final season of the fantasy series won't premiere until 2019. Fans have to wait nearly two years before any new episodes are released.
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The previous season of the series - Game of Thrones Season 7 was the highest rated season of the show yet, it broke several records in the process of gaining popularity. They will collaborate on the six-episode, eighth and last season, to air in 2019.
Executive producers include Benioff and Weiss, as well as Carolyn Strauss, Frank Doegler, and Bernadette Caulfield, while Game of Thrones author George RR Martin will be co-executive producer, along with Cogman, Guymon Casady, and Vince Gerardis. As the biggest hit in HBO's history, one the subscription service hoped to continue for additional seasons, keeping the show around awhile long isn't a bad thing. Some of its seven episodes were more than an hour long.
"Also, with season seven contending for Emmy awards in 2018 due to its summer launch past year, HBO can focus its GoT promotional efforts on its Emmy campaign rather than launching a new season". GOT star Sophie Turner previously told Variety that the production work of Season 8 of the series started in October and it is all set to air into the middle of this year.