Pretty Little Liars' Janel Parrish: You'll See a New Side to Mona in the Finale

TV Guide
Janel Parrish | Photo Credits: Eric McCandless/ABC Family

"Those b----es are finally going to get what they deserve." Or will they?

In the Pretty Little Liars Season 3 finale, Mona (Janel Parrish) is determined to take down Aria (Lucy Hale), Spencer (Troian Bellisario), Hanna (Ashley Benson) and Emily (Shay Mitchell) once and for all, and it appears she may have some help from the inside.

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"If [Spencer] is on the A team, which it looks like she is, then that would mean that Mona is now her boss," Parrish tells "The characters have definitely swapped a little bit. Mona is the new Spencer -- she's smart and in charge and nothing seems to faze her -- while Spencer was slowly spiraling out of control and now she's broken and on the A team."

But is Spencer really on the A team? Or is she simply infiltrating the band of black hoodies to find out intel, specifically if Toby (Keegan Allen) is really dead and the identity of the mysterious Red Coat?

"Someone has been controlling Mona," Parrish says. "This woman appears to be blonde, and a lot of people are speculating it's CeCe (Vanessa Ray), but also keep in mind is that while Mona is taking orders from this person, she was also in a mental hospital! So maybe she doesn't quite know who she was speaking to."

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As the season winds down, Parrish says the main event for viewers to look out for is the Hastings Family party. (Watch Mona talk about it in the video below.)

"The party is where it all goes down and there's definitely a big confrontation," Parrish says. "You'll definitely see some long-lost faces, somebody will be back from the dead and you might see a different side of Mona, something you've never seen before -- fans will know it when they see it."

The Pretty Little Liars finale airs on Tuesday at 8/7c on ABC Family.

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