Pretty Little Liars finally have the answer they have been five years for.

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A's identity is out in the open, although putting a face to the name will be a little harder. "Welcome to the Dollhouse" put an unexpected twist on the popular "twin theory," revealing that Jason DiLaurentes has a twin brother named Charles.

But who is Charles, really?

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Series creator Marlene King promises season 6 will dole out the answers to this question and more.

"All throughout season six, every episode of season six shores up what we learn about in this finale," King explained to ET Online.

In addition, the summer season will explain who the other mysterious 'A' accomplices were, including Red Coat and Black Widow.

"The finale and the next 10 episodes answer every single one of those questions," King teased.

While fans wait for June, we want to know who you think Charles is. Is the twin fraternal, making him anyone of several of Rosewood's handsome males, or is it an identical twin? Could there be more than one "Jason" running around the ill-fated suburb? Tell us what you think in the poll below!

Click the video below to see a preview for the series' latest episode, "Welcome to the Dollhouse."