Speaking on The Oprah Winfrey Show on Friday, the novelist refused to rule out reviving the child wizard franchise, but said that she did not feel Potter's adventures needed to be continued.
Rowling said: "I could definitely write an eighth, ninth, tenth [book]. I'm not going to say I won't.
"I don't think I will... I feel I am done, but you never know."
The 45-year-old also revealed that finishing the saga's seventh book Harry Potter And The Deathly Hallows felt like "a bereavement".
She added: "I did it. I'm really proud I did it. But this is a new phase."
Rowling's final Harry Potter book has been split into two parts for its film adaptation. Harry Potter And The Deathly Hallows: Part One is due to be released on November 19.
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