J.K. Rowling told Oprah Winfrey in a taped interview airing Friday that she may someday write another novel in the popular series.
Rowling says the characters are still in her head and she "could definitely" write several new books about them. She says: "I'm not going to say I won't." For now, she feels she's moved on to a new phase of her writing.
More than 400 million copies of the books about the boy wizard have been sold. Rowling says fame brought extreme pressures, including paparazzi and reporters searching her trash.
She says it was "like being a Beatle" and there was a time she "was barely hanging by a thread."