There are a couple bigger names joining the HBO series' cast, including Whale Rider star and Academy Award-nominated Keisha Castle-Hughes.
The 24-year-old actress is slated to play Obara Sand, an illegitimate daughter of the spectacularly departed Oberyn Martell.
Castle-Hughes will be joined by actors playing other members of the Martell claim, including Alexander Siddig, playing Doran Martell, Oberyn's older brother.
Jessica Henwick and Rosabell Laurenti Sellers plays Oberyn's younger illegitimate daughters, Nym Sand and and Tyrene Sand. Toby Sebastian will play Oberyn's son and heir, Trystane Martell.
Jonathan Pryce joins the show as High Sparrow, DeObia Oparei will be Areo Hotah and Enzo Cilenti will be Yezzan.
Nell Tiger Free joins the cast as the second actress to play Myrcella Baratheon, the oldest daughter of Cersei Lannister and Robert Baratheon.