Kaley Christine Cuoco (pron-en?ke?li ?kwo?ko?; born November 30, 1985)cite web title= Kaley Cuoco work=askmen.com url=is an American (United States) television actress (actor). She is best known for her roles as Bridget Hennessy on the sitcom 8 Simple Rules, Billie Jenkins on the supernatural drama Charmed and Penny (Penny (The Big Bang Theory)) on the CBS sitcom The Big Bang Theory (The Big Bang Theory (TV series)).