Penelope Keith win the 1976 Olivier Award for Best Comedy Performance for the play "Donkeys' Years". She became a household name in the UK playing Margo Leadbetter in the sitcom "The Good Life" (1975–78), winning the 1977 BAFTA TV Award for Best Light Entertainment Performance. In 1978, she won the BAFTA TV Award for Best Actress for "The Norman Conquests". She then starred as Audrey fforbes-Hamilton in the sitcom "To the Manor Born" (1979–81), a show that received audiences of more than 20 million. She went on to star in another six sitcoms, including "Executive Stress" (1986–88), "No Job for a Lady"
In Which We Serve US, earning $1.8 million in rentals. Bosley Crowther of "The New York Times" observed, "There have been other pictures which have vividly and movingly conveyed in terms of human emotion the cruel realities of this present war. None has yet done it so sharply and so truly as "In Which We Serve"... For the great thing which Mr. Coward has accomplished in this film is a full and complete expression of national fortitude ... Yes, this is truly a picture in which the British may take a wholesome pride and we may regard as an excellent expression of British strength."