Millie Winchester (Bianca Kajlich) is getting in on the hunt.

EW spoke with Kajlich about Millie’s growing involvement and her experience joining theSupernaturaluniverse.

BIANCA KAJLICH:It is my favorite costume that I’ve worn to date.

Bianca Kajlich as Millie Winchester, Nida Khurshid as Latika Dar, and Meg Donnelly as Mary Campbell in ‘The Winchesters’

Bianca Kajlich as Millie Winchester, Nida Khurshid as Latika Dar, and Meg Donnelly as Mary Campbell in ‘The Winchesters’.Elliot Brasseaux/The CW

No, I’m not.

I really am not.

Everybody looks good in that stuff.

Were you familiar with this universe?

My knowledge ofSupernaturalis that I worked with Jensen [Ackles] onDawson’s Creekback in the early 2000s.

I knew that he had gone off and done this show, and that it was very successful.

But I had literally never watched an episode.

And funny enough, I have dear friends that I did not realize did not miss an episode.

So, when I booked this, they were dying.

I’m like, “Are you serious?”

How was Millie initially described to you?

Well, I didn’t really get a description.

I literally got the pilot script and I got the breakdown of the character.

But she was very full-bodied.

This one, I felt like she came in full force.

So, I was super excited because what a badass character.

And this week, she gets to be even more badass and get in on the hunting a bit!

I was like, “Oh, really?”

I hadn’t even just pondered or dreamt about that.

To me, it was so rad that she was just this woman in her garage.

It never even occurred to me that maybe she might go out into the world.

I couldn’t believe it was mine.

I feel so special and so privileged to get to play her.

It’s also feels like such a nice addition to have her very adult energy in the mix.

Yeah, especially because the world is so precious to them.

Mary comes from a family of hunters and John feels like this was literally the calling of his life.

He was born to do this.

So, for them, it’s all very precious.

I don’t care about all the particulars, just, what do we need to do?"

I do think every group needs a leader like that.

We would all be a lot more efficient if we had someone like that.

The Winchestersairs Tuesdays at 8 p.m. ET/PT onThe CW.