Sienna Tiggy Guillory is an English actress and former model. She is perhaps best known for her portrayal of Jill Valentine in several entries of the Resident Evil action-horror film series. Other prominent roles include elf princess Arya Dröttningu in the fantasy-adventure film Eragon, and the title role in the TV miniseries Helen of Troy. She has also taken on starring roles in popular TV shows including Fortitude, Stan Lee's Lucky Man, and Luther.
