Fiona Shaw, CBE (born Fiona Mary Wilson; 10 July 1958) is an Irish actress and theatre director. Although to international audiences she is primarily known for her role as Petunia Dursley in the Harry Potter films or her role portraying Marnie Stonebrook in the HBO series True Blood, she is an accomplished classical actress. Shaw was awarded an honorary CBE in 2001. Read more on Last.fm