Kaley Cuoco

Biography: Although this attractive blonde came to prominence as a boy-crazed teen on 8 Simple Rules, Cuoco already had a decade of acting under her belt when she joined the sitcom in 2002. A successful child model and performer, she amassed an impressive array of film and TV parts before she was even old enough to vote. When 8 Simple Rules ended in 2005, Cuoco was quickly snatched up as new blood for Charmed. Although the occult series was canceled the following year, she found even bigger success in 2007 when she was cast in the popular sitcom The Big Bang Theory as the gorgeous neighbor to a pair of socially stunted nerds. Off screen, Cuoco enjoys horseback riding and owns a number of rescue dogs.