HBO is green-lighting a new "Game of Thrones" prequel after reportedly canceling another that starred Naomi Watts.
The cable channel said today it's given a 10-episode order to "House of the Dragon," set 300 years before the original series that ended its eight-season run in May.
The prequel is based on George R.R. Martin's "Fire & Blood," HBO said.
The new drama was co-created by Martin and Ryan Condal, whose credits include "Colony."
It will focus on House Targaryen, made famous in "Game of Thrones" by Emilia Clarke's Daenerys and her fearsome dragons.