Credit: Adam Rose/ABC Family Channel © 2010 Disney ABC Television Group Photo: Lucas in PLL Season 1, Episode 12:

Couples are forming left and right on Pretty Little Liars, but just when we were getting used to all the budding relationships, a new one will emerge on tonight’s episode. PLL Showrunner Marlene King tweeted “Two characters who have never kissed before will share a heart stopping, kick-ass lip lock in the #PLLfinale.” Naturally we’re curious and have a few guesses:

Now that Caleb (Tyler Blackburn) is gone and Hanna (Ashley Benson) is lonely and broken hearted, maybe she’ll give Lucas (Brendan Robinson) a chance. He’ll be back on tonight’s episode (finally!) and King hinted that he’s still interested in Hanna. In fact, Sean (Chuck Hittinger), Caleb and Lucas will all compete for Hanna's love, and considering she’s already locked lips with the other two, Lucas is the obvious answer.

However, King also revealed that Jenna (Tammin Sursok) will get a love interest by the finale. King tweeted “you will find out who Jenna bought the lace for in the finale” so maybe her and her mystery man will have an intense kiss.

King also told Zap2it, that the kiss is "just one of those things where you're like, 'Oh my god, I can't believe I'm seeing this!' It has a big music build."

Sounds like a juicy scene (aren't they all?) and we can hardly wait!

Sources: Twitter, Zap2it

MORE PLL:

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Caleb Leaves Town! Top 5 OMG Moments from Pretty Little Liars, March 14, 2011