Considering the clip at which "Game of Thrones" kills off its characters, it's no surprise the series had to announce the addition of several new actors to the cast for Season 5.
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.
Nell Tiger Free joins the cast as the second actress to play Myrcella Baratheon, the oldest daughter of Cersei Lannister and Robert Baratheon.