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  • Who is alex in pretty little liars

    • Who is a in pretty little liars...

    Who is A.D.? 'Pretty Little Liars' finally answers its running mystery

    Game over, PLL fans—we finally know who A is.

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    • And she looks pretty familiar.

    Pretty Little Liars viewers learned in the series finale Tuesday night that A.D. is Alex Drake — Spencer’s British twin sister.

    Yep, just when you thought things couldn’t get any crazier (first we see Melissa in the classic black hoodie, then she rips it off to reveal she’s Mona).

    Turns out there’s been a Spencer lookalike walking around all these years. And, oh yeah, she’s been impersonating Spencer.

    All those cheesy, overly sentimental lines that didn’t really sound like Spencer? That was Alex.

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    That random “one last kiss” for Toby? Alex.

    Strangely, it’s actually Jenna, a longtime nemesis of the group, who figures out that “Spencer’s not Spencer.” Her call to Toby after sensing something wasn’t right led him, along with Caleb and the other Liars, to Toby’s old house (which Alex bought).

    There, Alex had locked Spencer and Ezra in underground rooms -- on Aria and Ezra's wedding day, no less.

    Need a break?Play the USA TODAY

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