GLAMOUR: What kind of moments?

Meghann: Well, can I say, bitch?

GLAMOUR: Yeah you can.

Meghann: There is a moment in the show where I call Milly… Well, I don’t call Milly, I call Simone [Milly’s character] a stupid bitch.

Milly: Stupid bitch. You dumb bitch.

Meghann: Dumb bitch. And that is something I’ve definitely witnessed my best friends call each other. But it’s like that loving sisterly thing where you could say literally anything because it’s your sister, you can never say it to your friend or whatever. And so at first I was like, ‘oh my God, that’s such a crazy thing to say to someone’. But in the context of it being the sisterly thing, it was so much fun to say.

GLAMOUR: What’s the first piece of advice you remember getting?

Meghann: Ever?

Milly: Ever in my life?

GLAMOUR: Well, your first significant memory of feeling like, okay, that was a great piece of advice.

Meghann: When my therapist was like, ‘not everybody has to like you’. I was like, ‘what? That’s crazy.’ No, I’m kidding. I’m not kidding. That’s great advice.

Milly: That’s good advice.

GLAMOUR: And the hardest advice to take.

Meghann: Becoming comfortable with that… Yeah, it’s fully like… I mean, this was years ago that she said this to me and actually I walked into therapy and I described myself to my therapist as a people pleaser. And she was like, ‘there is a difference between being a people pleaser and wanting to control people’s perception of who you are’.

That was an incredible piece of advice that she gave me, that I still actively practice to be okay with just letting things go quickly instead of hanging onto them and rerunning things in my head and creating anxiety. I’m trying so much more now to release the things that have already come and gone or haven’t happened yet. Or that you don’t have any control over.

Milly: Yeah, my mum would always say to me ‘if all those idiots can do it, why can’t you?’ Honestly, really solid advice. Yeah. Because I was so scared to drive and then I was like, if that idiot can do it, then why can’t I do it?

Meghann: That’s great advice.

Milly: I can do that. Why not? Someone has to do it.

Meghann: Totally.

GLAMOUR: And in one word, what was it like to work with Julianne Moore?

Meghann: Inspiring.

Milly: Easy, but that’s the wrong word, but it was just like-

Meghann: Effortless.

Milly: Effortless.

This interview was edited and condensed for clarity.

Sirens is available to watch on Netflix now.