Just days before the Pretty Little Liars Season 4 premiere, creator I. Marlene King whetted the appetite of fans today by hyping a #PLLSpoiler that she just announced via Twitter.

And it didn't disappoint!

"The Queen Of Hearts from the Halloween train will b unmasked in the premiere," King wrote. "U will be shocked to discover Shims identity!"

That's all King said on the matter, leaving fans scrambling with theories and questions.

But the answers will come on June 11 when ABC Family airs "A is for A-L-I-V-E." Watch two clips from the PLL premiere now and comment now: Who is the Queen of Hearts?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.