"I wrote the Hermione/Ron relationship as a form of wish fulfillment," she said in an interview conducted by Emma Watson in the Sunday Times. "That's how it was conceived, really. For reasons that have very little to do with literature and far more to do with me clinging to the plot as I first imagined it, Hermione ended up with Ron."
Rowling said she knew her change of heart might upset her die-hard fan base.
"I know, I'm sorry, I can hear the rage and fury it might cause some fans, but if I'm absolutely honest, distance has given me perspective on that. It was a choice I made for very personal reasons, not for reasons of credibility," she said.
The author and the actress agreed that Harry and Hermione "were a better match," with Watson mentioning that fans had questioned the original pairing.
"I think there are fans out there who know that too and who wonder whether Ron would have really been able to make her happy," Watson said.