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Nellie Olesen was played by Alison Arngrim. I don't know what you mean by the original. Nellie was never replaced in the series. After she married Percival Dalton, they had twins they moved to New York to take over Percival's fathers company after he became sick. After the move, Nellie and Percival didn't come back into the series until the 9th season. Nellie's parents adopted a child named Nancy who acted just like Nellie.

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15y ago

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