Penelope Keith - www.imdb.com/name/nm0445285/

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Penelope Anne Constance Keith, CBE, DL (born Penelope Hatfield on 2 April 1940) is an English actress.

Having started her television career in the 1950s, Penelope Keith became a household name in the United Kingdom in the 1970s when she played Margo Leadbetter in the sitcom The Good Life. This role earned Keith her first of two BAFTAs, the second being in 1978 for The Norman Conquests. One year after The Good Life's finale, Keith was the lead character in another BBC sitcom, To the Manor Born, a show that received audiences of up to 24 million. During the 1980s and 1990s, she appeared in six other sitcoms, in each the lead character. Since the 1990s, Keith has appeared rarely on television and does more theatre work.

http://en.wikipedia.org/wiki/Penelope_Keith