Few book-to-film adaptations of the past two decades have divided audiences quite like Fifty Shades of Grey . Based on the 2011 novel by E. L. James, the movie was reviled by critics for its wooden dialogue and questionable portrayal of BDSM but embraced by audiences worldwide. With a Rotten Tomatoes score of just 24%, it seemed destined to be remembered as one of Hollywood’s most notorious flops. Yet, a decade later, Fifty Shades of Grey has become a sleeper hit on streaming in the U.S., with the entire trilogy currently available on Starz.

What many casual viewers don’t realize is that Fifty Shades of Grey began as Twilight fan fiction. E. L. James, a former TV executive, was inspired by Stephenie Meyer’s vampire saga after watching the first film adaptation. She devoure

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