When Cuoco was young she starred in a number of commercials including a few Barbie ads at age six.

She also starred in an Oscar Mayer commercial at age five. Our bologna has a first name, it's K-A-L-E-Y.

http://static.businessinsider.com/image/4f50d32569beddbb1a00002e-400-300/1990-1991-she-was-a-barbie-girl.jpg

Cuoco played a younger version of Ellen DeGeneres on the prime time series "Ellen."

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Cuoco has been an ace in Hollywood and on the tennis court, playing the sport since she was three-years-old. She finally made the full switch to acting in 2002.

She was featured on "Growing Up Brady," the tell-all made-for-TV movie that gave a behind the scenes of "The Brady Bunch."

Cuoco joined the cast of "Charmed" in their final eighth season with the idea of giving her character Billie an eventual spinoff. Thankfully for CBS, this didn't happen.

Cuoco began her current role as the hot girl-next-door to nerdy scientists, Leonard and Sheldon. Now in season 5, Cuoco earns $200,000 an episode. That's quite a raise from her original $60,000 per episode salary.

http://www.businessinsider.com/25-things-you-dont-know-about-kaley-cuococbs-big-bang-theory-sweetheart-2012-3#and-now-shes-single-again-26