Game of Thrones' final season may be premiering in 2019, but while it may be the end for some of our favorite characters, it will be nowhere near the end for the lucrative world of Westeros.

HBO has officially ordered its first ​prequel spin-off series from Game of Thrones, as ​The Hollywood Reporter reports, which will be "set thousands of years before the events of Thrones." The series will be co-created with source material from George R.R. Martin, just like Game of Thrones, and will be run by Jane Goldman (co-writer for films such as Kingsman, Kick-Ass, and X-Men: First Class).

The prequel series reportedly "chronicles the world's descent from the golden Age of Heroes into its darkest hour."

"Only one thing is for sure," teased the network, "from the horrifying secrets of Westeros' history to the true origin of the White Walkers, the mysteries of the East to the Starks of legend… it's not the story we think we know."

"I'll do anywhere from zero to five [successor shows]," HBO's Programming President Casey Bloys told ​The Hollywood Reporter back in January. "Though probably more likely one. But we'll see."

Game of Thrones' eighth and final season will air on HBO sometime in ​2019.