Fans of Harry Potter are in for an extra treat in the first film, with an added scene that isn't in the book!
Director Chris Columbus revealed to the Empire Online website that a section was written just for the film by JK Rowling.
It was originally supposed to be in the book of Harry Potter and the Philosopher's Stone but JK decided not to include it.
Key to Harry's past
Luckily she didn't throw it away and gave it to Columbus, who has used the scene in the film with the permission of JK.
Even better, Columbus said the scene gave a little key to Harry's past.
He also said that the film was not four hours long, as some people had said, but would last around two and a half hours.