[quote name=\'Matt Ottinger\' post=\'160527\' date=\'Aug 14 2007, 08:50 AM\']
Best one I can think of is Missy Gold, who played Family Feud with her Benson co-stars at the age of ten.
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I don't know if this would count or not, but when Melissa Gilbert appeared on The Hollywood Squares in August 1979, her siblings shared a square with her for a couple of "days." One of those siblings was four-year-old Sara Gilbert, future Rosanne regular.