03/20/2012 03:39 am ET Updated May 19, 2012

'Pretty Little Liars' Season Finale Reveals The Identity Of 'A' (VIDEO)

The mysterious identity of 'A' has plagued viewers and the cast for two full seasons now, but in the Season 2 finale of "Pretty Little Liars" (8 p.m. ET on ABC Family) the secret was finally revealed.

So who is 'A'? It was Mona.

But even that reveal doesn't appear to be the last of the secrets "Pretty Little Liars" has up its sleeve. After being unveiled as "A," the guilty party told the others to "join the 'A' team" or "disappear." This could mean that there is more than one person behind all the misery the others have had to endure all this time. And who was that in the red coat the end of the episode that 'A' told, "I did everything you asked me to."

Plenty more happened in this hour, but stop back by a bit later for that full recap to hash out all the details. "Pretty Little Liars" has already secured a third season and is scheduled to return to ABC Family in June 2012.

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