Sienna Tiggy Guillory is an English actress, and former model. She is known for playing the title role in the TV miniseries, Helen of Troy, her portrayal of Jill Valentine in the science fiction action horror film Resident Evil: Apocalypse, and as elf princess Arya Dröttningu in fantasy-adventure film, Eragon. She resumed her role as Jill Valentine for a cameo appearance in the 2010 action-horror film Resident Evil: Afterlife, and in Resident Evil: Retribution, released on September 14, 2012.