She says she's getting there: "I have a beginning, a middle and an end - you could read it all the way through and I know a lot of Harry Potter fans will say just give it to us.
"But I'm a perfectionist and I want a bit more time to tweak!"
The Order of the Phoenix will be as long as The Goblet of Fire and there are plenty of new things to keep fans engrossed.
There will be a new female Defence of the Dark Arts teacher and a new sorting hat song!
Don't believe what they say!