Back in October we found out that Academy Award nominee Naomi Watts would be starring in a Game of Thrones prequel spinoff.

Now eight new actors have joined Watts and Josh Whitehouse on the cast. You can find out who they are and learn more about the prequel series below.

As the final season of Game of Thrones approaches—something fans are no doubt excited about and dreading at the same time—we know that multiple spinoffs are still possible.

The closest spinoff comes from Game of Thrones author and creator George R.R. Martin and Stardust, Kick-Ass, X-Men, and Kingsman writer Jane Goldman. And now that very same spinoff has found itself a star as two-time Academy Award nominee Naomi Watts has joined the cast of the show.