For actors, premiere night is always incredibly special.

In the Ryan Murphy drama series, Diamond stars as Sister Megan.

“And yet, she doesn’t quite know if she has faith herself.

Micaela Diamond Getting Ready for Event

When you’re veiled in holiness, the temptation to sin gets confusing.

She struggles to reconcile these parts of herself.”

Ahead, Diamond offers a glimpse into how the look came to life from start to finish.

Micaela Diamond in a bathrobe

Courtesy of Emilio Madrid / Byrdie

There was something freeing about having my first TV show [character] be so unglamorous.

I’m not hiding behind anything."

Right before Christie applies makeup, she adds a layer ofEmbryolisse Lait-Creme Concentre.

Micaela Diamond in Bathrobe

I usedChanel Vitalumiere Aqua Ultra-Light Skin Perfecting Sunscreen Makeupin Beige 20.

I love this foundation on Micaela because it’s a light-to-medium coverage formula and super buildable.

I added a few drops of ChanelLes Beiges Sheer Healthy Glow Highlighting Fluidin Sunkissed and a few drops ofFlyte.

Micaela Diamond Posing in Front of Car Window

Courtesy of Emilio Madrid / Byrdie

70’s Glow Back.Global Prep Makeup Primerto the foundation, making it more luminous and glowy.

For concealing, I usedChanel Le Correcteur de Chanelin B20 and Rose."

This color looks like you’ve been flushed by the sun."

Micaela Diamond in Red Dress Posing in Front of Window

Courtesy of Emilio Madrid / Byrdie

We wanted to set the makeup without it looking like she had powder on."

Eyeshadow:“We kept it simple with just a wash of eyeshadow over her lids.

Lips:“For her lips, I applied MAC’sMACximal Silky Matte Lipstickin Taupe andClear Lipglass Lipgloss.”

On Her Red Carpet Beauty Essentials

“I always carryAquaphoreverywhere.

I’ll also have gum and aMAC Lip Liner Pencilto draw on at Balthazar’s for after-midnight pasta.”

We all wanted me to wear the dress and not the dress to wear me.

It felt simple and sleek.”

And when it wants to hold gel, great.

Texturally, we just wanted something kind of bizarre.

We tried this deep wine sheer velvet PRISCAVera turtleneck dress that felt incredibly bold and correct.

They see and need something from the other.

I was interested in where that cosmic relationship would go."

You want to venture to give a different performance on each take.

That was always my goal, to surprise myself."