Yeardley Smith (Lisa Simpson) and Marcia Wallace (Edna Krabappel) are the only cast members who do only one voice on a regular basis.
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Things You Didn't Know about The Simpsons
FanfictionHere are some mind-blowing facts that you probably didn't know about the Simpsons.
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Yeardley Smith (Lisa Simpson) and Marcia Wallace (Edna Krabappel) are the only cast members who do only one voice on a regular basis.
