Powley, 34, who will play Petunia Dursley in the upcoming HBO Max television adaptation of the Harry Potter series, said she “strongly disagrees” with Ms Rowling’s beliefs. “I strongly disagree with JK Rowling’s views on gender,” says Bel Powley, who will be playing Petunia Dursley (Harry Potter’s Muggle aunt) in HBO’s forthcoming TV adaptation of the Harry Potter books. Despite her disagreement with the author’s views, Ms Powley described herself as a huge fan of the book series. Bel Powley plays Petunia Dursley in the new HBO Max Harry Potter series. When does the new Harry Potter TV series start?