Cincinnati Kid said:Cynthia Pepper - who played "Margie Clayton" in the 1961-62 ABC-TV Network show, Margie. She was also "Jean Pearson" the girl next door in the first season of My Three Sons (1960-61).
I never saw "Margie" except on a brief YouTube clip..But she was on Stu Shostak's Internet Radio Show April 16, 2008..Here is the page with the download of the interview
http://stusshow.com/2008.html
Scroll down to "show 70"
She was a delightful. charming lady and did a great interview, talking in great detail about the "Margie" series and her other movie and TV roles..Along with growing up in a Show-biz family..