Naomi Watts First Actor Cast in Game of Thrones Prequel Series

HBO's prequel series to Game of Thrones has cast its first lead in British actor Naomi Watts.

According to Entertainment Weekly, Watts will star in the untitled prequel to HBO's record-breaking series Game of Thrones, which is based on the A Song of Ice and Fire series of fantasy novels written by author George R. R. Martin. Details about Watts' role in the prequel series were kept largely under wraps, though the character has been described as “a charismatic socialite hiding a dark secret.”

RELATED: REPORT: Game of Thrones Prequel Series Starts Filming in October

The untitled prequel series will be helmed by Kingsman: The Secret Service writer Jane Goldman and Martin, among others. The series is set thousands of years before the events of Game of Thrones during "the world’s descent from the golden Age of Heroes into its darkest hour." The series will examine horrifying secrets of Westeros’ history, from the true origin of the white walkers and the mysteries of the East to the Starks of legend.

The Age of Heroes takes place 10,000 years prior to the events of Game of Thrones and saw the construction of Winterfell and the Wall by Bran the Builder, the founder of House Stark, leading into the Long Night and Westeros' greatest war (so far) against the White Walkers.

RELATED: Game of Thrones Prequel Ordered to Pilot By HBO

Despite previous reports suggesting that the series would begin production in October of this year, filming on the series is expected to begin in early 2019. The series is currently still seeking directors and other actors to round out the cast.

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