It’s been a bittersweet week of news for fans of Pretty Little Liars, the network recently announced that season 7 will be the final season of the show, and the big summer-finale is set to debut on Freeform. The show has been such a tremendous success on Freeform over the years, and the network has done an amazing job of cultivating a leading social-media presence to interact with fans. Now the #PLLARMY will have to start bracing for the big goodbye, and there is no better time to start than with the summer finale, which airs tonight at 8pm. So don’t wait until the last minute and forget, set a reminder and hop on Twitter or Facebook and take part in the big event with your fellow PLL-Heads.

The good news is that Freeform will be airing an all-day ‘Pretty Little Liars’ marathon, which is already underway, lasting from 11:00 a.m. right up till the 8:00pm timeslot. The new episode that will be airing tonight is called “The DArkest Knight,” playing the infamous A that has been such an amazing constant throughout the series.

The network teased the big finale stating, “The PLLs confront old foes head-on and mayhem ensues,” adding, “the Liars face off with their enemies in a chaotic fight that ends fatally. One of the PLLs learns a secret about her past that changes everything while another Liar discovers something about her future that could alter her course forever.” Of course we will have to wait for the finale to find out which of our favorite stars that the tease is referring to, but #PLL fans should be used to teases and twists at this point.

It all goes down tonight, and hopefully our secret favorites survive the episode unscathed. “Pretty Little Liars” is produced by Alloy Entertainment in association with Warner Horizon Television and is executive produced by I. Marlene King, Oliver Goldstick, Leslie Morgenstein, Charlie Craig and Joseph Dougherty. The series stars Troian Bellisario, Ashley Benson, Tyler Blackburn, Lucy Hale, Ian Harding, Shay Mitchell, Andrea Parker, Janel Parrish and Sasha Pieterse.