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Actor Josh Whitehouse has been cast in the prequel of HBO hit series "Game of Thrones".
Whitehouse, best known for BBC series "Poldark", joins Naomi Watts in the prequel's pilot episode, reported Variety.
However, the details of his character are not known yet.
The actor is currently working on the remake of 1983 romantic comedy "Valley Girl.
Watts, 50, who joined the series on Wednesday, will be playing a "charismatic socialite hiding a dark secret".
According to the network, the new show will be set thousands of years before the events of "Game of Thrones".
It will chronicle the world's descent from the golden Age of Heroes into its darkest hour. From the horrifying secrets of Westeros's history to the true origin of the White Walkers, the mysteries of the East to the Starks of legend, the official logline of the show read.
The as-yet untitled project hails from creator Jane Goldman and author George RR Martin.
The show's pilot is based on a story from Goldman and Martin, with teleplay credited to Goldman.
The duo will also executive produce the show alongside James Farrell, Jim Danger Gray, Vince Gerardis and Daniel Zelman.
Martin and Goldman's "GOT" prequel is the first of several potential series set in the world of Westeros to move forward at HBO beyond the script phase.
In May 2017, a multitude of writers were announced by HBO to be working on what Martin described as the "successor shows."
The other writers working on the potential spin-offs are Max Borenstein, Brian Helgeland, Carly Wray, and Bryan Cogman.
PTI