'Pretty Little Liars': Keegan Allen On #Spoby & How Fans Will 'Flip Out' Over The Series Finale

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On the set of "Pretty Little Liars," Keegan Allen talks with AccessHollywood.com about what it's been like watching Spencer and Toby's relationship in the show evolve over the years. Plus, the actor addresses the show coming to an end, and the series finale. "Pretty Little Liars" returns for its final 10 episodes on April 18 at 8/7c on Freeform.

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