Pretty Little Liarsseries finale: I. Marlene King reveals her original idea for A.D.

Spoiler alert: This post contains plot details from the series finale ofPretty Little Liars.

Yep, A.D. was Spencer’s secret (and very evil) twin.

And once Alex connected with her half-sister Charlotte, she realized just what she’d been missing.

And after that worked, Alex came up with a new plan.

She was going to kidnap Spencer and assume her identity.

And it almost worked.

EW spoke withPLLshowrunner I. Marlene King about the finale’s big reveals and more.

Were there other ideas you couldn’t make work?I.

So although we didn’t see Alex on screen until season 7, Alex was A.D. in 6B.

So Alex was the one who shot Spencer?Yes.

Who visited Mona in a black hoodie at the start of the hour?That was Wren.

That was Wren before he was made into a necklace.Yes.

[Laughs] Exactly.

So Wren knew that he was the father of those babies.

Was there anyone you really wanted to get back that you couldn’t?We got Melissa.

We really wanted to get Jason back.

We couldn’t get Jason.

And we really wanted Mike, Cody Christian, and we couldn’t get him back either.

Both were busy on other shows.

How did that come about?That was the entire writers' room brainstorming.

We didn’t just want to leave it on the sad goodbye.

What’s the twist on the twist that will get you excited?

And I wanted Mona to live happily ever after, so we came up with that.

I finished the script probably a month before I wrote that scene.

It took me a long time to sit down.

Go to your office and write that scene."

As a writer, that was my goodbye to the PLLs.

It was a tough one.

I hope fans got that.

We literally did say, could we have a double wedding?

Or should we have a triple wedding?

That felt like it was a little too much.

But I think they got their happy ending.

Is that something you’re thinking you’d like to explore?Yes.

I just love this town, and Rosewood is such a fascinating place.