Carice van Houten and Stephen Dillane are the latest to join the HBO series. They will play the sorceress Melisandre and the late King Robert Baratheon's (Mark Addy) older brother Stannis respectively, Entertainment Weekly reports.
In the George R.R. Martin novels that form the basis for the television series, Melisandre is described as a beautiful priestess always dressed in red. She acts as a counsellor to Stannis, who believes himself to be the rightful heir to the Iron Throne.
In late June, Tudors veteran Natalie Dormer joined Games of Thrones to play Margaery Tyrell, a woman from the House of Tyrell who is pledged to wed young Renly Baratheon (Gethin Anthony) as part of a plot to take the Iron Throne from King Joffrey.
Earlier this month, Gwendoline Christie was cast in the role of Brienne, a servant of Renly and the only daughter and heiress of Lord Selwyn.
Dillane previously starred in the miniseries John Adams, as well as the film King Arthur. Van Houten is a Dutch actress who has appeared in movies such as Valkyrie and Repo Men.
Game of Thrones will return next spring.
Watch Emilia Clarke talking about Game of Thrones below:
Watch Emilia Clarke talking about the sex and nudity in Game of Thrones below:
Watch Mark Addy discuss Game of Thrones below: