EXCLUSIVE: Alex Aiono (Doogie Kamealoha, M.D., Finding ’Ohana), Mallory Bechtel (Dear Evan Hansen on Broadway, Hereditary) and Eric Johnson (Fifty Shades Trilogy, The Knick) have joined the cast of HBO Max’s Pretty Little Liars: Original Sin as series regulars. They will appear opposite stars Chandler Kinney, Maia Reficco and Bailee Madison.