The thing to remember, though, is that Alison is different than the mean-spirited girl she was when she left. "Alison's a totally different person, so to see the way they treat her is going to be very interesting and to see the way that she gets affected by it is also going to be very interesting," Pieterse says. Troian Bellisario says it'll be a weird adjustment for all of the girls, especially Spencer, to have Ali back in town. "I think the interesting thing about all of this is when you look back, especially in the flashbacks, Alison was not a calming, soothing best friend," she tells Zap2it. "It became a lot easier when she went away for the girls to have relationships, for them to feel confident in themselves and for them to live their lives. Now that she's back it's really going to throw a wrench in those works, especially for Spencer because she is highly competitive with Alison and it's going to put her back in a very insecure place." Ashley Benson thinks Hanna will feel the same way. "I think she's going to feel a little intimidated by Ali," she says. "I don't know if it's going to be a good thing or a bad thing; I think it may be a mix of both. She bullied her! No. Hanna won't stand for that anymore. Hanna's a tough girl."