As expected, the "Pretty Little Liars" season 7 finale blew the minds of the fans in a majorly shocking plot twist. This article contains major "PLL" spoilers, so if you haven't watched the finale yet, you might want to read at your own risk. To continue, the final episode dropped the A.D. bomb and revealed her identity as Alex Drake. It turned out that there were two twins in the series - Mary Drake and Jessica DiLaurentis and Spencer Hastings and Alex Drake.

The big reveal can be considered as the biggest plot twist in the history of the series and now that the secret is out in the open, Troian Bellisario is the liar that has been shoved in the spotlight.

According to Mail Online, Troian Bellisario knew about the possible ending as early as Season 5. During that time, Marlene King was the one who broke the news to her, but she was reportedly told to keep it a secret since it was still to be finalized.

The liar can keep a secret

Troian Bellisario filmed "Pretty Little Liars" season 5 carrying a very big secret about A.D.'s identity. When it was time to film "PLL" season 6, Marlene King reportedly talked to Bellisario once again to confirm that the network and the rest of the showrunners have agreed with the concept of Spencer having an evil twin. However, she was still forbidden to share the secret with her fellow liars.

For short, Troian Bellisario had to keep the big finale secret for two years. In an interview with Elle, Troian Bellisario shared the moment when they had a script reading for "Till Death Do Us Part." She shared that it felt like a reunion for all the people who were part of "Pretty Little Liars" since season 1.

The 31-year old actress also shared that she had a lot of fun playing the role of Alex and Spencer at the same time.

Playing the roles of twins with different personalities can be quite difficult, and Bellisario admitted that she took some inspiration from punk rocker, Sid Vicious, to help her portray the evil Alex Drake.

'PLL' reunion

Now that the "PLL" final chapter has been put to a close, the fans are left with a big chunk of separation anxiety. In some social media posts pertaining to the "PLL" finale, some fans have been sharing their sentiments, saying that Tuesdays are never going to be the same again.

Of course, the possibility of a spinoff is still up in the air, but as of writing, showrunners have yet to confirm or give some details about it. Meanwhile, Mail Online reports that Troian Bellisario and the rest of the liars are open for a reunion, possibly set 10 years after the finale.

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