Coincidence?Harrys birthday is July 31, 1980. Rowlings birthday is also July 31 but in 1966

The actress who played Moaning Myrtle was 37 years old at the time Harry Potter and the Chamber of Secrets was filmed. She is the oldest actress to ever portray a Hogwarts student.

Ron Weasleys character originally swore a lot, but Rowlings publisher wouldnt let her use that sort of language because it wouldve been inappropriate for young readers.

4J.K. Just Kidding!4J.K. Just Kidding!Rowlings publisher suggested she use initials rather than her real name, Joanne Rowling, in order to appeal to male readers. She chose J.K., borrowing the K from her grandmothers name, Kathleen. Howev

Spoiler Alert!!Only Alan Rickman, the actor who played Professor Snape, knew his characters fate before the release of Harry Potter and the Deathly Hallows because Rowling told him

Rowling said the inspiration for the name of Harrys school in the books, Hogwarts, may have unconsciously come from the name of a plant she saw in the Kew Gardens in New York City

Rupert Grint dressed up like his female drama teacher and rapped about Ron Weasley for his audition tape. His rap began, Hello, my name is Rupert Grint, I hope you dont think I stink

Contrary to popular belief, the t at the end of Voldemort is silent. The name comes from the French words meaning flight of death

J.K. Rowling slightly based 11-year-old Hermione on herself at the same age. She even made Hermiones patronus her favorite animal, an otter.

An outbreak of lice occurred among the children cast members during the filming of Harry Potter and the Chamber of Secrets

Tom Felton auditioned for the roles of Harry Potter and Ron Weasley, but was chosen to play Draco Malfoy instead

The idea for Sirius Blacks tattoos came from those used in Russian prison gangs. The markings identify the person as someone to be feared and respected

Robbie Coltrane, the actor who played Hagrid in the films, has gotten a mini-fan and a fruit bat stuck in his famous, shaggy beard.hagrid

Dementors, the deadly phantoms that guard Azkaban Prison, represent depression and were based on Rowlings struggle with the disease.

Over 400 million Harry Potter books in 67 languages have been sold worldwide as of 2008.

Probably the most impressive of Harry Potter facts is that J.K. Rowling is the first person to become a billionaire U.S. dollars by writing books.

Probably the most impressive of Harry Potter facts is that J.K. Rowling is the first person to become a billionaire U.S. dollars by writing books.

While filming Harry Potter and the Prisoner of Azkaban, Tom Feltons Hogwarts robes had their pockets sewn shut because he kept trying to sneak food onto the set.

One of the flying cars used in Harry Potter and the Chamber of Secrets was stolen off the set. It was discovered seven months later when an anonymous caller informed police of its whereabouts.

M.O. McGonagall is listed on one of the Quidditch trophies in Harry Potter and the Sorcerers Stone. Could Professor McGonagall have been a renowned Quidditch player back in the day

People had trouble pronouncing Hermiones name, so Rowling had her sound it out for Viktor Krum in Harry Potter and the Goblet of Fire

Epic FailForty versions of Salazar Slytherins infamous locket had to be created to accommodate Harry and Rons failed attempts to destroy it during filming.

Playing Hooky.When Harry Potter and the Prisoner of Azkaban was released in Great Britain, the publisher asked stores not to sell the book until schools were closed for the day to prevent truancy

Staying In Character.In order to become acquainted with the films three main stars, director Alfonso Cuaron had each of them write an essay about their characters. True to their characters, Emma Watson wrote a 16-page essay, Daniel Radcliffe wrote a simple, one-page paper, and Rupert Grint never even turned his in.

The least successful Harry Potter film, Harry Potter and the Prisoner of Azkaban, made 90 million more than the most successful Twilight movie.We hope you enjoyed these 25 Harry Potter Facts. Did you learn anything new? Which one of the Harry Potter facts did you find most surprising?