Sort-of.
Petunia Dursley, Harry Potter's awful aunt, is coming to True Blood! Muggle-no-more, Fiona Shaw, who has portrayed Aunt Petunia throughout the Harry Potter series, will play Marnie, a homely palm reader and medium who succumbs to the spirit of a powerful witch.
Looks like Aunt Petunia will finally get to be a witch and wave a wand...True Blood-style.