To be a Pretty Little Liars fan is to live in fear that any of the Liars you've come to love will turn out to be the latest incarnation of A. There have been tons of fan theories that implicate the show's stars, but after six seasons of close calls, you've become pretty sure that your five faves would never turn to the dark side.

But let go of everything you've come to trust, because a Tumblr user named The Outlast just shared an Uber A theory so convincing, you might actually believe that Spencer Hastings has been pulling strings in Rosewood all along.

The Outlast dissects clues that span all the way back to season three of PLL. The theory is so in-depth and intense that you should absolutely read Outlast's blog post to get every gritty detail, but here is the basic outline:

The theory stems from a reference Spencer made in episode 3x12 to a popular '90s movie called Basic Instinct. In the movie, a manipulative author manages to cover up numerous murders by writing books about the crimes. "Remember that movie, Basic Instinct?" Spencer said in the episode. "She wrote a murder mystery novel to cover up a crime that she was about to commit. It was actually kind of genius."

Well, five years later in season 6b, Charlotte has been murdered and Spencer revealed that it was done in a way similar to that of a murder she described in one of her college essays. That is a pretty sketch coincidence, right? (Also, who writes a college essay about murder?!)

The theory goes on to point out countless times Spencer was team sketch. Like how she was the only one that could have drugged Emily in episode 3x12. Or how she dressed up as Mary Queen of Scots — the woman who plotted to assassinate Queen Elizabeth I so she could take the throne. And the fact that all the other As have had a connection to Radley and Spencer is the only Liar who's spent time there.

Finally, the craziest theory of all: Outlast thinks Spencer was adopted from Radley. It's revealed Spencer was born through a surrogate in the Pretty Little Liars book series (Outlast mistakenly says she was adopted). This could definitely be a twist on that storyline on the show. It would explain why she felt a connection with "Charles" in the vault room and also why she remembered playing Hide & Seek with Melissa growing up when Melissa didn't. It's because she was playing with a child at Radley.

I know, your brain is being twisted into knots right now and you're still not totally convinced. Well, this isn't even the half of it! Read The Outlast's entire theory below and you probably won't be able to get the idea that Spencer is Uber A out of your head until the bitter end of season 7.

UPDATE: Facebook user Hannah pointed out that this theory mistakingly says Spencer was adopted in the books when she was, in fact, born through artificial insemination. The post has been updated to reflect this.

Noelle Devoe Entertainment Editor When I'm not holed up in my room going on a completely unproductive Netflix binge or Tumblr stalking Timothée Chalomet, I'm searching for awesome celeb news stories that Seventeen readers will love!

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