The prequel series to HBO's Game of Throneshas its first star: Naomi Watts.

Watts has signed on as "a charismatic socialite hiding a dark secret," though all other details, including her character's name, remain a mystery. The casting brings to an end to what Deadline describes as the "lengthy negotiations" that led to the show's first cast member signing on.

As we previously learned, the prequel series is set thousands of years before the events of Game of Thrones. It unfolds during the late stages of Westeros's so-called "Age of Heroes," a time that featured -- among other things -- humanity's first clash with the White Walkers.

Watts is the first and only cast member to be revealed so far. Game of Thronescreator George R.R. Martin is involved as an executive producer, alongside Jane Goldman, also the prequel's showrunner.

It's not clear when the series pilot will be shot or when anyone outside of HBO will get to see it. But given the topsy-turvy nature of Hollywood creative development, where projects can disappear in an eyeblink, this casting news is a good sign that HBO is moving forward with the prequel.

(责任编辑：关于我们)