Watch the official "Meet Mouse" featurette for the HBO Max thriller series Pretty Little Liars: Original Sin, created by Sara Shepard.

Pretty Little Liars: Original Sin Cast:

Chandler Kinney, Maia Reficco, Bailee Madison, Zaria, Malia Pyles, Alex Aiono, Mallory Bechtel and Eric Johnson

Stream Pretty Little Liars: Original Sin now on HBO Max!