Courtesy Pretty Little Liars/ABC Family

The season 2 finale of the hit ABC Family show " Pretty Little Liars" is tonight and fans are eagerly waiting to find out the secret identity of the treacherous texter known only as "A."

For those not as well-versed in the "PLL" world, "A" has been terrorizing the girls since the beginning and the big reveal of "A's" secret identity has set the blogosphere abuzz, with many dubbing today "'A' Day."

Three of the show's stars - Lucy Hale, Troian Bellisario and Shay Mitchell - stopped by "Good Morning America" today with four brand new, exclusive clues about who the infamous "A" could be.

Check out the clues below. We ask all of the "Pretty Little Liars" fans out there to weigh in and help us piece together who "A" could be.

1. "A" admires one of the PLLs more than the others.

2. "A" loathes one of the PLLs more than the others.

3. "A" has a motive to justify "A's" evil deeds.

4. "A" wants a playmate.

What do these clues mean? Who is "A"? Tune in when "A's" identity is revealed on "Pretty Little Liars" tonight on at 8/7c ABC Family.