Sonya Walger (born 6 June 1974) is a British-American actress. She had starring roles in the short-lived sitcoms The Mind of the Married Man (2001–2002) and Coupling (2003) before landing her role as Penny Widmore in the ABC drama series Lost (2006–2010). Walger later starred on Tell Me You Love Me (2007), FlashForward (2009–2010), Common Law (2012), The Catch (2016–2017) and For All Mankind (2019–2022).