Sienna Guillory
- Born
- 16 March 1975 (51 years)
- Place of birth
- Kettering, England, UK
- Gender
- Female
Sienna Tiggy Guillory is an English actress and former model. She portrayed Jill Valentine in the Resident Evil action-horror film franchise. Her 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 is the daughter of American folk guitarist Isaac Guillory and Tina Thompson, an English model.
