Joan Ann Olivier, Baroness Olivier (née Plowright; 28 October 1929 – 16 January 2025), commonly known as Dame Joan Plowright, was an English actress whose career spanned over six decades. She received several accolades including two Golden Globe Awards, an Olivier Award, and a Tony Award as well as nominations for an Academy Award, two BAFTA Awards, and a Primetime Emmy Award. She was made a Dame by Queen Elizabeth II in 2004.
Plowright studied at the Old Vic Theatre School before acting onstage at the Royal National Theatre where she met her husband Laurence Olivier. She acted opposite him in the John Osborne play The Entertainer on the West End in 1957 and on Broadway in 1958. She earned the Tony Award for Best Actress in a Play for her A Taste of Honey (1961). She won the Laurence Olivier Award for Filumena (1978).