EXCLUSIVE! Pretty Little Liars Shocker: Find Out Why [SPOILER] Needed to Die!

ABC Family

And another Rosewood resident bites the dust...

WARNING: We're about to recap the most jaw-dropping moments from tonight's Summer Finale of Pretty Little Liars. If you don't want to be spoiled, turn away now. For everyone else, grab some tissues and read on…

What the &$#! just happened?!

The Pretty Little Liars summer finale just ended and after watching that emotional roller-coaster of an episode, we're now a blubbering hot mess of tears. As promised, one of our favorite Rosewood residents did not survive the jaw-dropping hour, and now we've got the exclusive scoop from executive producer Marlene King about why [Spoiler!] was the one who had to die, and what this means for the future of our beloved dark drama.

So which of our favorite little liars perished in tonight's dark and deadly summer finale? Say goodbye to…

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Mona Vanderwaal (Janel Parrish)!

That's right, the former queen bee-turned-manipulative mastermind was murdered in the final few minutes of tonight's fatal finale, and although we are absolutely devastated to see Mona go, we have to admit... that was a an amAzing finale!

's Marlene King previously revealed to ETonline that although this was an "emotionally challenging" episode for her to write, it "needed to be done." Marlene, who was forced to break the news to Parrish of Mona's death, told ETonline that it was "the most difficult call" she has had to make in the history of the series.

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"I want fans to know that the decision to tell this story was made a long time ago," the showrunner explained. "I think sometimes these episodes are promoted for the shock value, like 'Oh my gosh all of the sudden someone's going to die!' But I don’t want people to think that this was haphazard in any way."

Not to worry, little liars, King dished that like all of PLL's most shocking moments, Mona's death is a part of a much greater picture. "We weren’t spinning the dial and saying, 'Okay it landed on that person, time for them to die!' It was nothing like that," she said. "This story point came to us over a year ago and it felt like it was a very important part of the big Pretty Little Liars story that we needed to tell."

So what was the decision for killing off this character in particular? King teased, "The answer to that question will unfold as to story moves forward." (Better start throwing our your guesses now!)

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And for all of our fellow fans who are currently crying their eyes out, Marlene has a special message for you: "We're all in this together, and it's going to be okay." *Sniff Sniff* If you say so, Marlene...

Ready for more exclusive PLL scoop? Of course you are! Tweet your pretty little questions about tonight's Fatal Finale to @LeanneAguilera, check back to ETonline first thing Wednesday morning for an exclusive Q&A with Janel Parrish! (She could answer your question, so keep tweeting all night!)

What did you think of tonight's mind-blowong Pretty Little Liars finale?! Sound off in the comments below!