From 1972 to 1981, Mary McDonough personified the youthful "Erin Walton" in the classic family series, The Waltons. After the success of the series, McDonough would land various roles in popular television shows, but never fully garnered the fame she once had as "Erin". Find out more in the video above!

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Mary Elizabeth McDonough of The Waltons today

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Mary McDonough attends the 40th Anniversary Reunion of The Waltons on December 2, 2011 in Jersey City, New Jersey