Jean Lyndsey Torren Marsh, (born 1 July 1934) is an English actress and writer.
She co-created and starred in the ITV series Upstairs, Downstairs (1971–75), for which she won the 1975 Emmy Award for Outstanding Lead Actress in a Drama Series for her performance as Rose Buck.
She later reprised the role in the BBC's revival of the series (2010–12).
Marsh also co-created the television series The House of Eliott in 1991.
Her film appearances include Cleopatra (1963), Frenzy (1972), The Changeling (1980), Return to Oz (1985), Willow (1988) and Monarch (2000).