Naomi Watts is set to play the role of Death Eater Narcissa Malfoy in Harry Potter and the Half-Blood Prince. In addition to Watts, who will join the all-British cast after stating “I consider myself British and have very happy memories of the UK,” both Joseph Fiennes — brother to Ralph, who plays the series’ villainous Lord Voldemort — and Stuart Townshend are expected to join the production. Pic is slated for a November 21, 2008 release.