JK Rowling used her experience of depression in her mid-20s to create the Dementors.

Neville and Luna didn’t end up together.

Snape’s portrait wasn’t originally put up in the Headmaster’s office, but Harry insisted it go up next to Dumbledore’s.

When Dumbledore comes face to face with a boggart (a shape-shifting non-being that takes on the form of the viewers worst fear), he sees the corpse of his sister Ariana.

Fred and George once threw snowballs at Voldemort’s face.

They were only separated twice, first when George’s ear was cut off and then when Fred was killed.

9 and 3/4 wasn’t the only platform at King’s Cross Station. Platform 7 and 1/2 leads to the Orient Express.

Harry and Ginny’s oldest son James eventually stole the Marauader’s Map from his dad’s desk.

There are a whopping 700 possible fouls in Quidditch.

Rowling said killing Hedwig was necessary because it represented Harry’s loss of security and innocence, and the end of his childhood.

The first person to create a Horcrux was a Greek wizard named Herpo the Foul. He also bred the first Basilisk.

Professor McGonagall was once married to her former boss at the Ministry of Magic, but he died 3 years into the marriage.

She also excelled in Quidditch. A bad injury ended her athletic career in her last year at Hogwarts.

Tonks’ patronus used to be a jackrabbit, but it changed to a wolf when she fell in love with Lupin.

Lupin’s patronus is also a wolf. He doesn’t like it..you know, because of the whole werewolf thing.

Voldemort was 71 when he died at the Battle of Hogwarts.

Rowling originally planned for the last word in the series to be “scar,” but changed her mind in the end.

Because of the connection to dark magic and his dislike for muggle-borns, Lucius wanted Draco to go to Durmstrang instead of Hogwarts.