Nancy Cartwright voices the mischievous 10-year-old son, Bart, in the animated TV show, The Simpsons. "I don't know of any other character that has more catch-phrases than Bart," she says. Courtesy of FOX hide caption

toggle caption Courtesy of FOX
'Whoa, Mama!': A Voice Actress's Road To Fame As A 10-Year-Old Boy
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Is science more like a pyramid, or a sun-dappled patch of ground? Fayez Nureldine/AFP/Getty Images hide caption

toggle caption Fayez Nureldine/AFP/Getty Images