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Warning: This story contains major spoilers from the season finale of Scream. Read at your own risk!

For those of you keeping score at home: EW’s theory about Scream’s killer was correct.

In Scream’s season finale, the killer was revealed to be the Sarah Koenig wannabe Piper (Amelia Rose Blaire), who is actually the daughter of Brandon James and Daisy, a.k.a. Emma’s mother Maggie (Tracy Middendorf). Why did she attempt to slaughter everyone in town? She blames Daisy for the loss of her father and is vexed that she was given up for adoption while Emma (Willa Fitzgerald) got the perfect life. EW caught up with Blaire to get the scoop on that killer reveal and whether Piper is really dead. (See our chat with executive producer Jill Blotevogel here for what to expect from season 2.)

ENTERTAINMENT WEEKLY: When did you find out you were the killer?

AMELIA ROSE BLAIRE: I found out on my last day of filming episode 6 right before I did the scene with Will in the abandoned car dealership. I definitely did not see it coming. That was really cool to get to discover that, and also shocking and terrifying at the same time.

Once you knew, did it change your motivations at all? Is there anything you wished you had done differently earlier in the season knowing that you were the killer?

No. I’m actually glad that I didn’t know. When I first started, I knew that Piper was a Brandon James sympathizer. There was some kind of history there. I didn’t know to what extent, but I felt like, “Why else would she come to Lakewood? Why would she come at this particular time? There has to be some kind of personal connection.” I thought that she was probably going to be helping the killer, but I didn’t know that she was actually the one behind the mask. I’m glad that I found out when I did. It was definitely shocking because I had made this huge bible of everything the killers had been doing and profiling all the different characters, trying to decide for myself who I thought was the killer, so to then turn all that research around on Piper was really cool and creepy to see that’s where I was coming from and not somebody else.

Did you guys sit around on set trying to guess who the killer was?

Yes, definitely, and it kept changing. Every single script we would get, it would change who was in the spotlight. But we had so much fun trying to figure out. Once I found out about Piper’s true identity, I didn’t tell anybody. It wasn’t until the last episode when we got the last script that everybody else found out it was me as well. Some of them were like, “I knew it!” and other people were like, “How could you do this to us?!” It was a fun secret to get to hold.

Did you take any inspiration from the Scream killers who came before you?

I love Billy Loomis (Skeet Ulrich). He was probably my favorite killer, and the first one. I loved the way he played with the knife and how he would go from being very cool and calm and then become completely enraged, so I wanted to get to play with those different levels and colors and pay homage to him in that way, and the other killers as well. He definitely sticks out in my mind as the original killer.

Were you ever in the costume aside from that scene in the finale?

No, that was the first time I put it on. It was trippy. I remember when I first put the mask on, my whole body was shaking. Then when you have the cloak on, it gives you this dark, dark energy and this weighted energy. It was very exhilarating and terrifying to be in this mask with the cloak on, big boots and the knife. It was unreal.

What was the best part about filming that final confrontation on the dock?

I honestly don’t really remember filming it. I remember walking onto the dock, and then once I took the mask off, I don’t really remember what was going on. I loved the fight sequence and the end when I was backing Emma up toward the end of the dock, and then getting attacked by Maggie and stabbing her — all of the fight sequence was really cool. But the actual scene, the big monologue, I really honestly don’t remember doing.

You sound a little like a serial killer right now…

That’s because maybe … no, no, no. [Laughs] Playing one, you go into a weird mindset. I totally justified why all of these people needed to be killed. It was a strange conversation to be having with myself. It was really, really weird.

Were you surprised by her motivations or do you totally get it?

I totally get it. Once I put myself in as the killer in my bible that I had, it made total sense why she was doing this, and why each person had to go the way that they did. Also, it’s so sad that this is how she felt like she had to deal with it and cope with all of this anger, was to systematically murder off her half-sister’s friends.

They heavily insinuated that Audrey (Bex Taylor-Klaus) was her partner, but didn’t outright reveal it.

I honestly haven’t seen it, so I don’t know how it is going to play, but I kind of like that they don’t say, “This is who Piper’s accomplice is,” because that just adds for more deliberation. I like how they liked having a partner because there was someone else I could talk about this dark side of Piper with. If I had done it all alone, it would’ve been very lonely.

Do you know who the partner is?

I do, yes. But I will not say for sure one way or another.

Piper’s body wasn’t found, so is there a chance she could return?

Well, she got shot in the forehead, so that’s pretty dead. I would love to get to come back and play Piper again from this other side of her. Essentially for the entire season, she was wearing a mask, which is interesting because she talks all about lifting masks, so the fact that she was going around wearing one is interesting — and I don’t know if I’d say hypocritical, because I’m on her side. [Laughs]

EW posted a theory that you were the killer. Did you see that?

Yes, I did! I was like, “Oh my God, they’re good!” You got it right on. Hats off to you. I definitely did not put two and two together when I read that piece. I was like, “Maybe Brandon James was killed the same year her father was killed, and her father didn’t get any attention because the Brandon James trial was so much bigger.” I never put two and two that Brandon James was Piper’s father. I really like that. From the beginning, I knew that Piper would have this deep compassion for Brandon, so the fact that I ended up being his daughter was really cool.

So you really didn’t know you were the killer when you read the story?

No, I didn’t! I was so convinced that it was somebody else, it couldn’t have been me. I was like, “No, they’re going to make it one of the teenagers. It’s not going to be Piper. Piper is the Gale Weathers. Gale is not killing people!” So I did not see it coming at all.

Scream will return for a second season in 2016.

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