The 19-year old who has made more than £18 million from playing Hermione Granger in the wizard franchise, is a cousin 14 generations removed from Joan Playle
Her distant relation, from Great Waltham in Essex, was one of only 270 known people tried of witchcraft during the reign of Queen Elizabeth I.
But rather than be burned at the stake, it appears Miss Playle was merely excommunicated from the Church of England.
Although details of Miss Playle's conviction remain unclear, it would appear she was unmarried. Those generally accused of being witches in the 16th century were either old, poor, unprotected, or singler or widowed women.