Pauline Collins, (born 3 September 1940), is an English actress of stage, television, and film, who first came to prominence portraying Sarah Moffat in Upstairs, Downstairs (1971–73) and its spin-off, Thomas & Sarah (1979). In 1992, she released her autobiography, titled Letter to Louise.

Collins played the title role in the play Shirley Valentine, for which she won an Olivier Award in 1988, and Drama Desk and Tony Awards in 1989. She reprised the role in the 1989 film adaptation, winning the BAFTA Award for Best Actress in a Leading Role and receiving Golden Globe and Academy Award nominations. She also starred in the television dramas Forever Green (1989–92) and The Ambassador (1998–99). Her other film appearances include City of Joy (1992), Paradise Road (1997), Albert Nobbs (2011), Quartet (2012), and The Time of Their Lives (2017).