As fans prepare themselves for the "Pretty Little Liars" Season 6A finale, there is one finale theory about Aria that has fans buzzing.

Given the recent "Pretty Little Liars" Season 6A finale sneak peek, it's fairly certain that Aria is not in fact Charles DiLaurentis or "A." However, a reddit fan posted a theory regarding Aria that may still unravel as the series moves forward.

"It's been heavily hinted that there is a twin and it's been suggested that Aria is perhaps more connected to the storyline than we think," wrote reddit user HandsomeLittleLiars.

"I think that Bethany is Aria's twin, and that the Montgomerys adopted her. It was Aria that made the connection between adoption and lying about age, so I think that it's possible she is the one who was adopted. I think that Eddie Lamb genuinely thought he recognized her, but the "she" he recognized was Bethany's face if you get me?"

One reason this theory is taking off is due to "Pretty Little Liars" executive producer Marlene King's recent Twitter response to whether viewers will see Bethany Young's face or not.

"Tricky question to answer," said King.

Judging by reddit, fans are not satisfied with the answer.

"This indicates to me that she's intimating in a way, we have already seen Bethany'c face," wrote TobysDoRag. "Ergo, she's someone's twin."

Still, the major mystery people are anticipating to be solved is the identity of Charles. On Wednesday, Alloy Entertainment asked Janel Parrish her favorite reveal from the "Pretty Little Liars" season 6A finale.

"The Charles reveal, who Charles is and who A is as Charles is going to be a mind-blower," she said.

"I will say that every question every fan has wanted answered since season one will all be answered in one episode. Who hit Alison on the head? Who killed Bethany? Who killed Toby's mom? Who's Red Coat? Who is Black Widow? All of those questions. They're going to go into a giant flashback that will show everything that has happened."