Fifty Shades of Grey was initially Twilight fanfiction!

This is probably the most well known fact in the Fifty Shades universe but it is no less stunning. E.L. James initially had begun writing the story with Edward and Bella of Twilight fame as the leads. However, fan reviews were so astounded by the erotic content that they started petitioning E.L. James to change the characters and create her own story instead.