Fiona Shaw CBE (born Fiona Mary Wilson; 10 July 1958) is an Irish actress and theatre and opera director, known for her role as Petunia Dursley in the Harry Potter film series and her role as Marnie Stonebrook in season four of the HBO series True Blood (2011). She has worked extensively with the Royal Shakespeare Company and the National Theatre, twice winning the Olivier Award for Best Actress; for various roles including Electra in 1990, and for Machinal in 1994. She won the 1997 Drama Desk Award for Outstanding Solo Performance for The Waste Land. Her other stage work includes playing the title role in Medea, both in the West End and on Broadway (2001–02). She was awarded an Honorary CBE in 2001. Shaw was born in County Cork and was raised in the Roman Catholic faith. Her father, Denis Wilson, was an ophthalmic surgeon and her mother, Mary, was a physicist. She attended secondary school at Scoil Mhuire in Cork City. She received her degree in University College Cork. She trained at the Royal Academy of Dramatic Art (RADA) in London and was part of a 'new wave' of actors to emerge from the Academy. She received much acclaim as Julia in the National Theatre production of Richard Sheridan's The Rivals (1983). Shaw is openly lesbian and was previously in a relationship with actress Saffron Burrows.

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