The actress will play Ellaria Sand, the "sexually adventurous" lover of Prince Oberyn Martell a.k.a. The Red Viper, who we reported last month will be played by Chilean actor Pedro Pascal. Sherlock writer-actor Mark Gatiss also joins the cast in an unspecified role.
Game of Thrones is created by David Benioff and D.B. Weiss, based on the novels by George R.R. Martin. HBO hasn't announced when the Season 4 Premiere will debut yet, so stay tuned for that announcement. You can CLICK HERE to watch the show's entire panel from Comic-Con 2013 last week.