Before the "Pretty Little Liars" season 4 finale, the cast and producers of the hit ABC Family series gathered at PaleyFest 2014 to reveal some last-minute spoilers.

As fans expect, the season finale is deemed the most shocking "Pretty Little Liars" finale yet.

Executive producer Marlene King confirms that Alison will once and for all reveal the secrets of the night she went missing in the "Pretty Little Liars" season 4 finale, including whether Mrs. DiLaurentis had something to do with it.

"Well a lot of that comes out in the finale. Alison really does share with the PLLs what happened the night she died and it's in a chronological order," she says to E! Online.

In addition, spoilers confirm that there is a "shocking Ezria twist" in the finale that will forever change the fate of the pair on "Pretty Little Liars." Sadly, King remained mum about whether Ezra will have his redemption in season 5.

And as "Pretty Little Liars" season 4 ends and season 5 begins, actress Sasha Pieterse admits that Alison's return won't be easy.

“The dynamic is going to change drastically,” says Pieterse according to TVLine. “Welcoming her back is not going to be as easy as it should be.”

“Season 5 is shaping up to be, emotionally, the most complex season so far. There are five Pretty Little Liars now," adds King.

During the PaleyFest, the producers also touched on the longstanding demand for a musical episode, as well as a potential movie.

“The reality is … producing them takes longer,” explains executive producer Oliver Goldstick about musical episodes. “But it’s not impossible.”

And what about a movie?

"We talk about it all the time," says King. “We’d love to make a movie when the show [ends.]“

Spoilers also confirm that Caleb will return to "Pretty Little Liars" after a long absence during season 4 during the 100th episode in season 5.