What's PLL Day? Tweets, Keeks, and GIFs That Celebrate the Holiday

Erin Kim
Yahoo! TV
"Pretty Little Liars" -- "A is for A-L-I-V-E" Shay Mitchell, Troian Bellisario, Lucy Hale, Ashley Benson, Janel Parrish
"A is for A-L-I-V-E" - In the season four premiere of "Pretty Little Liars," entitled "A is for A-l-i-v-e," the Liars are desperate to uncover what new scheme "A" has in store for them in the wake of the lodge fire, and have no choice but to turn to Mona for answers, now that she is also being targeted. Aria struggles with seeing Ezra in the wake of their breakup, and Emily starts to make plans for life after high school. Meanwhile, "A" sets Toby on a new path, what's in the trunk is revealed, and a shocking discovery reverberates through Rosewood.

It's Tuesday. What does that mean? Nothing much until you check your Twitter feed and see that "Pretty Little Liars Day" is trending all over the social media scape. Tonight, ABC Family is airing the summer premiere for the fourth season of "Pretty Little Liars" — i.e., "Pretty Little Liars Day." With all the hype bubbling online, PLL Day might as well be a national holiday.

As with a countdown to Christmas, the day is registered in the fans' clocks...

in their wardrobes...

in their daily habits...

in their words...

and in their hearts.

It seems like there was no other reason to be alive until today.

The only inspiration to breathe during preceding days was to express their anticipation for the big premiere through memes and GIFs.

The biggest question that fans are asking is #whatsinthetrunk? PLL stars Ashley Benson, Shay Mitchell, and Troian Bellisario tickle the audience's curiosity by tweeting about the show's big mystery.

Bellisario, who plays Spencer Hastings, correlated PLL's undying question with a scene from the film "Se7en," starring Brad Pitt.

Benson, who plays Hanna Marin, simultaneously expressed her PLL enthusiasm while throwing back to her younger self, who was also precociously passionate about the show.

With her Twitter teasers, Benson is evidently the most prolific tweeter and most expressively excited about PLL Day.

She even Keeked a video of herself.

Her Keek garnered a handful of animated Keekbacks that involved singing (@theresalinobo18), and confessions: "My life sucks without Pretty Little Liars, and I'm currently watching reruns of you and Caleb right now... My Tuesdays are gonna be complete from now on." (@kayrenee14)

The cast keeps the audience on its toes with hints about what will go down tonight...

and viewers will deff be tweeting across the nation.

For these fans, to live is to PLL, and we forecast a season of tweets and social media surprises that will be well worth tracking. The show's Sasha Pieterse (@sashaapieterse), who plays Alison DiLaurentis, will be tweeting along during the premiere tonight (#PLLchat). Fasten your Twitter seatbelt, prepare the hashtags, and may the memes begin.

Happy Pretty Little Liars Day, America!

"Pretty Little Liars" returns Tuesday, 6/11 at 8 PM on ABC Family.