Following the 'Pretty Little Liars' Halloween special episode, "We Love You To DeAth," that aired on Tuesday, the next special episode will be broadcast on December 9, and is entitled, "How The 'A' Stole Christmas."

The cast of 'Pretty Little Liars', Troian Bellisario, Ashley Benson, Lucy Hale, Shay Mitchell and Sasha Pieterse, Bianca Lawson, Ryan Merriman and Bryce Johnson will answer fans in an interview.

The executive producer of the show, Marlene King, revealed that the identity of "A" will be known before the seventh season.

The holiday episode for Christmas will be the first since the show first aired. Aria, Emily, Hanna, and Spencer will be looking for ways to clear Spencer's name and prove a connection between Alison and Bethany.

On that note, King will write and direct the special episode "How The 'A' Stole Christmas,"

"I am extremely excited to write the PLL Christmas episode. And I'm directing that one too! @PLLlittletheory." she wrote.

Though Mona, played by Janel Parrish, was killed during the summer finale, she will be returning as a ghost.

Parrish in an interview said that Mona will be the ghost of Christmas past, present and future and she will mess with Allison, played by Pieterse, while wearing a fabulous costume.

The promotional video of the holiday episode is already out. The video begins with the sound of Christmas bells, and a swooping shoot of Rosewood-snow covered and decked to the halls.

The festivities end quickly, with the voice of Emily who is telling her friends to make a Christmas wish to which Hanna promptly answers, "wishes don't come true, Emily."