Her and Harry Potter actually share the same birthday July 31st

She filled 5 whole notebook pages before she came up with the word "Qudditch"

Her parents met at kings cross thats where Harry takes the Hogwarts express to Hogwarts

She has no middle name the k stands for her grandmothers name

Kathleen

She was living off benefits when she finished Harry Potter and the Philosophers Stone

In five years, she became a multi millionaire

She has written 7 Harry Potter books which got turned into movies!

But she also has tried writing movies with The Fantastic Beasts series