• It was Rowling's publisher that suggested she use her initials, J. K., instead of her name.
  The thought was to try and appeal more to boys.


• Alan Rickman, who played Professor Snape, was the only person to know the true fate of the character prior to the book release.


• Most people pronounce Lord Voldemort's name with a "t" at the end, but the "t" is actually silent.


• While filming, Emma Watson, who plays Hermione Granger, would often mouth the lines of other characters causing the production to stop to refilm.


• The inspiration for Siruius Black's tatoos came from Russian prison gangs.