Kaley Cuoco is best known for playing Penny in the hit CBS series "The Big Bang Theory," but she's actually been acting since she was 6 years old. In 1992, she got her first big-screen role in "Quicksand: No Escape," which starred Donald Sutherland and Felicity Huffman. Fast-forward 20-odd years later, and Kaley is now a big showbiz name with her own star on the Hollywood Walk of Fame. —XFINITY Entertainment Staff (Photos by Mark Davis/Getty Images, MCA/Universal)
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