You haven't got a letter on yours," George observed. "I suppose she thinks you don't forget your name. But we're not stupid-we know we're called Gred and Forge.

Merlin's pants!" shrieked Hermione, jumping up and running from the room. "Merlin's pants?" repeated Ron, looking amused. "She must be really upset.

I think writing about the time in Hermione’s life that I write about – growing from childhood into womanhood, literally, I think it brought back to me how very difficult it is.So much is expected of you as you become a woman, and often you are asked to sacrifice parts of you in becoming a girl, I would say. Hermione doesn’t.

In a novel you have to resist the urge to tell everything.

I've only suffered writer's block badly once, and that was during the writing of Chamber of Secrets. I had my first burst of publicity about the first book and it paralysed me. I was scared the second book wouldn't measure up, but I got through it!

Fred and George turned to each other and said together, “Wow — we’re identical!

A lemon drop. They're a kind of Muggle sweet I'm rather fond of.