From Wikipedia, the free encyclopedia. Helen McCrory (born 17 August 1968) is an English actress. She portrayed Cherie Blair in both the 2006 film The Queen and the 2010 film The Special Relationship. She also portrayed Narcissa Malfoy in the final three installments of the Harry Potter movies. Description above from the Wikipedia article Helen McCrory, licensed under CC-BY-SA, full list of contributors on Wikipedia