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On Mona: "There's an upcoming episode when I tackle Mona [Janel Parrish]," Troian dished. She explained a bit more about the scene, saying. "Mona's bating Spencer and bating Spencer ... and I was thinking, these girls have never been able to retaliate, so I had to launch myself over a table and take out poor Janel ... I let out this Tarzan scream and I scared Janel so bad."
On Spencer's transformation: "She burns herself to the ground and rises up out of the ashes. By the end of the season, Spencer is someone completely new and there is no going back."
And if you think you've already seen Spencer's breakdown, think again! According to Troian, the devastation just keeps coming: "When she finds out about Toby, it's not the end of her hitting rock bottom — there are about 7 more basements for her to fall through."
Troian also dished that we'll see a physical transformation, too, as Spencer's picture-perfect preppy looks gives way to a far less polished style.
For much more from Troian, check out the full interview here.