According to The Hollywood Reporter, after a lengthy search, Fox 2000 has found its warrior heroine for Eragon. Sienna Guillory has signed on to play Arya, a skilled fighter and powerful leader of a combative tribe.

Based on the best-selling novel by Christopher Paolini, the film centers on a boy named Eragon who harnesses his magical powers and becomes a great dragon rider. The fate of the empire depends on his ability to kill the evil king.

Teen newcomer Ed Speleers stars as the title character, while Djimon Hounsou, Jeremy Irons and John Malkovich fill out the ensemble cast.