Pretty Little Liars Season 7 episode 13 spoilers: Could THIS character be the elusive AD?

Spencer and Emily have played AD's game and now it's Hanna's turn to find out what the villain has in store for her.

Also read: Here's why Rita Ora tried her best to avoid Mel B and Stephen Belafonte

Next Tuesday's episode of Pretty Little Liars will see Hanna facing unexpected hurdles and dealing with shocking consequences when she tries to takes on AD. But who exactly is AD?

The internet is flooded with theories about AD's identity and according to a new fan theory, Spencer's twin could be the villain. According to Tumblr user The Outlast, Bethany Young is AD and she is also Spencer's twin.

Dr Cochran helped Mary deliver two babies when she was a patient at Radley. What if the second baby was not Charlotte, but Spencer's twin? 

The cast of Pretty Little Liars opened up to Us Weekly about AD, saying the revelation will be shocking.
"I don't think anybody would guess it," said Ashley Benson. Here's what Tyler Blackburn claims about A.D: "You've never met them. You kind of have. When you see it, you'll understand what I'm saying."

The synopsis for Season 7 episode 13 Hold Your Piece reads:

Hanna is sure Jenna is to blame for a recent professional setback and is forced to bring Caleb up to speed on current events. Aria and Emily team up to investigate Sydney for more information about Jenna and her connection to A.D. Spencer grows closer to Detective Furey, while Aria struggles with her current situation with Ezra. Hanna's turn at the game is more intense than she bargained for and leads to shocking consequences.

Pretty Little Liars airs Tuesdays on Freeform.