The 'A' mystery is over and done with, but the Pretty Little Liars won't be out of danger for long.

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Someone is coming for the disaster-prone college grads, and that someone's name is currently Pretty Little Liars' next big secret.

"I can't confirm or deny if there's a new 'A,' but yes, 'He' is prospected to be the show's new baddie," showrunner Marlene King told TV Line. "'He' is not Charlotte or CeCe or anyone related to that particular name. It's a different person the girls are coming to warn Alison about."

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While Charlotte's reveal left a few questions unanswered, this new villain will finaly put the kibosh on all of Rosewood's biggest mysteries, like who really killed Mrs. D.

"There are two final twists, and we've got 30 episodes to deliver them," King teased.

The Liars are currently on a break, during which time they will age five years and put their college years behind them. Season 6B will hit ABC Family this winter.

Catch up with the Liars when Pretty Little Liars returns with "Of Late I Think of Rosewood."