Polly Alexandra Walker (born 19 May 1966) is a British actress. She has starred in the movies "Enchanted April" (1991), "Patriot Games" (1992), "Sliver" (1993), "Restoration" (1995), "The Gambler" (1997), and "Savage Messiah" (2002),"Rome" (2005–2007). She is also known for her roles in BBC One dramas "Prisoners’ Wives" (2012–2013), "Line of Duty" (2016, 2019) and Netflix Original period drama "Bridgerton" (2020-).