|"Is this all real? Or has this been happening inside my head?"
The subject of this article is a real-life person, company, product, or creative work that has been mentioned "in-universe" in a canon source. The Harry Potter Wiki is written from the perspective that all information presented in canon is true (e.g., Hogwarts really exists), and, as such, details contained in this article may differ from real world facts.
Behind the scenes
- Isaac Newton is briefly mentioned on Pottermore under the out-of-universe "J.K. Rowling's thoughts" portion of the entry for the Philosopher's Stone as one of the real world alchemists who sought to make a Stone.
- Harry Potter and the Prisoner of Azkaban (film) (Mentioned only)