This year for Season 5 of 'Pretty Little Liars,' the producers are switching things up with a Christmas episode (as opposed to the annual Halloween episode) and plenty of new cast members.

Keep on reading to find out exactly what we know about these new developments.

Executive producer and show runner Marlene King will be in charge of the first ever Christmas special, which she will both write and direct, telling Twitter:

As she previously teased of the event, she's going to try her hardest to get Ezra in Santa boxers someway and somehow.

Season 5 premiere director Norman Buckley, on the other hand, will be in charge of the big 100th episode, which promises to bring with it one big reveal that has nothing to do with the return of Caleb.

And as far as new cast members go, actress Shay Mitchell -- who plays Emily -- shared a photo of the most attractive cast member yet, whose name is Casey.

Here's hoping that Casey becomes a recurring character!

The pup will be joining new Season 5 cast member and 'Carrie Diaries' actress Chloe Bridges, who will play Rosewood swim team member Sydney, a new lady who may steal Emily's heart.