The wonderful world of Harry Potter has cast a spell on people around the globe, but there are a few magical secrets that some fans might not know...
Ever since Harry Potter and The Philosopher's Stone was released back in 1997 the magical world created by now legendary author J.K. Rowling has become a global phenomenon.
Seven books and eight blockbuster films later (constantly on TV!), and Harry Potter is still a firm favourite with fans around the world. But could there still be a few insider secrets we still don't know?
Here are 7 think you might not already know about the world of Harry Potter...
1. JK Rowling originally wrote the names of the Hogwarts houses on the back of an airplane sick bag
Back in 2000 J.K. Rowling revealed during a chat with schoolchildren in America that she loves thinking of names for new characters and places in her books. She confessed: "I invented the names of the Houses on the back of an airplane sick bag. This is true. I love inventing names, but I also collect unusual names so that I can look through my notebook and choose one that suits a new character."
2. Helena Bonham Carter kept a special Bellatrix souvenir
Actress Helena, who played Bellatrix in the Harry Potter films admitted to Entertainment Weekly that she kept her character's teeth after filming finished... "I loved my fake teeth, I kept them because they don't fit anyone else. I keep them in a blue plastic thing in the bathroom and bring them out when I miss her!"
3. Daniel Radcliffe had Harry's lightweight bolt scar applied 2000 times!
Over the course of eight films, it's understandable that Harry's infamous forehead scar was applied a lot of times. In the first two films it was painted directly onto Daniel's face, however by the third film the makeup department used a special glue that stuck it on. In total the scar was applied 5800 times, with the remainder being put on stunt doubles.
4. Arthur Weasley was supposed to die in book five
J.K. Rowling has admitted that when she first plotted the books out, Ron's dad wouldn't make it after his vicious attack by deadly snake Nagini in Order of the Phoenix. But when the author realised that there weren't enough good father figures in the book she decided to let Arthur live after all!
5. Emma Watson had eight auditions for the role of Hermione
Not only did Emma have to audition a huge number of times for her role as Hermione, but she also had her first audition for the part in her school gym!
Rupert Grint had a very different approach to auditioning... he discovered you could audition by sending a video into BBC's Newsround, and so sent a video of himself rapping about why he wanted to play Ron.
6. The actress who played Moaning Myrtle was much older in real life
The actress who played toilet haunting ghost Myrtle was actually 37 when the films were made. Shirley Henderson, who played the 14-year-old spook told the BBC it was much harder playing a ghost than a human... "Because of all the technical stuff involved it was much harder. I had to be strapped to a harness so it looked as if I was flying. It's physically very tiring and requires a lot of concentration."
7. J.K. Rowling kept Harry's fate a secret right until the end
J.K. Rowling was so determined that no one would find out what happened to Harry at the end of the final book that she didn't even tell her husband what happened. After Rowling saw Daniel in stage hit Equus he asked her point blank if his character was going to die, to which she admitted he had a death scene. But when her husband asked her what she'd told Daniel, she refused to tell him anything. She kept Harry's ultimate fate a secret from everyone right until the very end.
Main pic: WireImage
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