Janel Parrish Dishes on Her Close Friendship With The Perfectionists Costar Sasha Pieterse

The debut season of the Pretty Little Liars spinoff, The Perfectionists, had viewers hooked for more reasons than one: the developing romances, a mysterious murder, and, of course, the amazing fashion. But one of the best parts about the first season is the blossoming friendship between Mona Vanderwaal (Janel Parrish) and Alison DiLaurentis (Sasha Pieterse). The characters were often at odds in Pretty Little Liars, but they begin to form a closer bond in the subsequent series as staff members at Beacon Heights University.

As two reformed mean girls with intertwined pasts, they hope to turn over a new leaf. But they soon find themselves embroiled in another scandal, and have to join forces while using previous experiences from their Rosewood days to get to the bottom of what's happening at BHU. For Parrish, showing viewers a more positive relationship between Mona and Alison has been particularly fun, especially since she and Pieterse are such good friends off screen.

"Sasha and I have always been so close," Parrish told POPSUGAR over the phone on July 9. "When we had scenes together in PLL, we were always fighting. So [in The Perfectionists], it was really fun to explore what a friendship looks like between Mona and Alison. It came pretty easily to us because we are really close in real life. It was so fun to come to work every day and be partners in this thing together." Parrish also said working with the other members of the cast was a good experience, adding, "It makes it easier, chemistry-wise, when everybody gets along. We were very fortunate that we all got along great."

Although the series hasn't been renewed for season two yet (Come on already, Freeform — give us the good news!), Parrish does have hopes for the potential second season of the show. "If there is a season two, I want Mona to get back with Mason!" she said. "They're so cute, and I love seeing Mona open up to people."

"I also hope they find out who The Professor is," Parrish added. "So they need to give us season two so that people can find that out! I have my fingers crossed." Parrish mentioned that she has a few theories about who could be The Professor — an anonymous person who admits to killing Nolan and begins to terrorize some of the BHU students — but doesn't want to give voice to them, just in case she accidentally cracks the code. We, however, have already named a few suspects of our own.