Sasha Pieterse: New 'PLL' Halloween Clips!

Sasha Pieterse checks her phone after meeting Tammin Sursok for the first time in this new clip from the Pretty Little Liars Halloween special.

In the episode “The First Secret,” It’s the Halloween before Alison (Pieterse) went missing and the only concern for Aria (Lucy Hale), Emily (Shay Mitchell), Hanna (Ashley Benson) and Spencer (Troian Bellisario) is to score an invite to Noel Khan’s Halloween party.

But with a new girl in town to challenge Ali for Queen Bee dominance, Spencer possibly losing the class president election along with her parents’ approval, and a shocking revelation for Aria about her father �” there may be more to worry about than finding the perfect costume.

“The First Secret” premieres NEXT Wednesday, October 19th @8PM ET/PT on ABC Family. Check out the clips below!