The American actress, best known for her role as Penny in the series The Big Bang Theory and the role of Billy Jenkins in the series Charmed. In October 2014, she became the owner of star number 2532 on the Hollywood Walk of Fame. She made her film debut as Karin in the 1995 film Virtuosity. In 2016, she began dating Karl Cook, and they got married on June 30, 2018. She starred in the hit show The Big Bang Theory, which was created by Chuck Lorre.