Known to legions of fans as Erin from the 70s TV series The Waltons, Mary McDonough took on the memorable role in 1971, when she was 11 years old. It was her first major acting gig, and she would remain with the series until it ended its run in 1981, though McDonough would reprise the role for subsequent Waltons TV movies, like 1982's A Wedding on Walton's Mountain.
The following decades would find...
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