An attempt was made to alter Radcliffe’s and Watson’s appearance, though. He was given green contact lenses to match Harry’s eye colour in the books. However, these aggravated his eyes and the idea was abandoned. Watson, meanwhile, was meant to wear buck teeth but she could hardly speak in them.
After they got the roles, the three were banned from skiing for the duration of their roles. Presumably to prevent any terrible injuries!
British comedian Rik Mayall was cast as Peeves, Hogwart’s resident poltergeist. A scene was filmed featuring the character but was eventually cut – and has never resurfaced. Peeves never made it into any of the films.
Most of the books in Dumbledore’s office are actually phone books – repackaged in fancy binding and covered in dust to make them look old and magical.
When production designer Stuart Craig asked Rowling about the layout of Hogwarts, she sketched a map on an A4 piece of paper for him. Craig continued to use this for guidance on all subsequent films.