Only Alan Rickman Knew Fate Of Snape Character

By the time the first Harry Potter movie was released, J.K. Rowling had already written about five Harry Potter books. Severus Snape's character is pretty much straightforward in the first five books. His love for Lilly Potter was revealed only in the 'Harry Potter and the Deathly Hallows' book. No one except Alan Rickman had known the story of Snape before the book was published.