(Photo by Arnold Jerocki/Getty Images) Keira Knightley has revealed that she wasn’t aware of the J.K. Rowling backlash before signing up for a Harry Potter audiobook cast. In September, Deadline announced that she’s lending her voice to Professor Umbridge in Pottermore Publishing and Audible’s Harry Potter: The Full-Cast Audio Editions. Keira Knightley reacts to J.K. Rowling boycott In conversation with Decider, Knightley shared that she wasn’t aware of Rowling’s boycott for her anti-transgender views and apologized. She said, “I was not aware of that, no. I’m very sorry. You . . .