Polly Alexandra Walker (born 19 May 1966) is an English actress. She has starred in the films Enchanted April (1992), Patriot Games (1992), Sliver (1993), Restoration (1995), The Gambler (1997) and Savage Messiah (2002). In 2006, she received a Golden Globe Award nomination for her role in the drama series Rome (2005–07).
Walker was born in Warrington, Greater Manchester,</ref> England. She attended Padgate Church of England Primary School in Warrington and Silverdale Preparatory School, West Acton, London. At 16, Walker graduated from Ballet Rambert School in Twickenham and began her career as a dancer but had to abandon dancing after a leg injury at the age of 18. She then decided to become an actress. She moved from the Drama Centre in London to the Royal Shakespeare Company, where she played bit parts for six months before graduating to small roles on television.
Walker landed the title role in the television series Lorna Doone before making her feature debut in Shogun Mayeda (1991). In that same year she appeared in Les Equilibristes and in Mike Newell's Enchanted April, in which she played an aristocrat eager to escape the attentions of her persistent male admirers. Walker first gained international attention in 1992 as a single-minded English member of an Irish terrorist group in Phillip Noyce's Patriot Games. In 2003 she had a starring role in the BBC drama series State of Play.