Kaley Christine Cuoco (pron.: / / KAY-lee KWOH-koh; born November 30, 1985) is an American American film and television actress. She first came to attention for her role as Bridget Hennessy on the Emmy Award-winning sitcom 8 Simple Rules (2002–2005). She later starred as Billie Jenkins on the final season of the supernatural drama series Charmed (2005–2006). She has gained international acclaim and recognition for her current role as Penny on the Emmy and Golden Globe award-winning comedy series The Big Bang Theory (2007–present), which became the highest rated comedy on US television among adults 18–49 for the 2009–10 season.