The Gross, Guilty Pleasure Madelaine Petsch Shares With Millions Of People

Almost as synonymous with Cheryl Blossom's red lipstick is her matching hair color — which is 100 percent unaltered (and not changing any time soon).

"My hair's naturally red and if I ever dyed it, I think my mom would disown me," she said, laughing. "So I don't ever think about dyeing my hair. However, cutting my hair is an interesting thing because my hair grows incredibly fast. We cut it shorter at the beginning of this season [of Riverdale] but I kind of miss not having a lot of hair to touch. I think I'm ready to grow it out long again."

"My boyfriend [Travis Mills] is pretty used to seeing me with weird stuff on my face," Petsch laughed. "He's very used to my obsession with skin care, so it's not a new thing to him. Most men don't know how to take care of their blackheads, and one of my favorite things on the planet is to put my Bioré Witch Hazel Ulta Deep Cleansing Pore Strips ($7) on him. It's the best, because then you get to look at all the good juice afterward. Oh god, I'm disgusting."

The infatuation doesn't end there, either: "I'm so obsessed with pimples, it's gross," Petsch said, adding that she's also been known to watch some blackhead extraction videos. (Dr. Pimple Popper, you hear that?) "But then after 10 or 15 [clips], just scrolling through Instagram, I get a little sick and have to turn it off."

No, she won't tell you what red lipstick she wears on Riverdale ("I will absolutely never divulge that," Petsch said) but she did say she applies it herself for the show. A tip she learned along the way? "I always conceal around my lips afterward because that gives it that crisp line — I learned that from my makeup artist [Erin Mackenzie]."

"I'm a big self-care gal," Petsch said. "Every single night after work, I take a nice bubble bath, because we all know we need to detox after a long day. I'll put in soaking salts or a bath bomb. I like the Lush Sex Bomb Bath Bomb ($8) because I'm obsessed with everything rose and that one's got rose petals in it. It's really nice. And then, I love to mask in the bath. Once a week, I'll put on my pore strips and Bioré Blue Agave & Baking Soda Whipped Nourishing Detox Mask ($6). It leaves a nice tingly feeling, so when you get out of the bath, you can take your mask off and do a nice luxurious skincare routine, and your skin just feels very fresh and awakened. I take my time. No one's rushing me. It's quite nice, my little nighttime routine."

Working with a group of young, talented actors seems like a prime opportunity for beauty tip swaps — and it is, to a point. "Lili [Reinhart] is really good with skin care and makeup, but we all have picked up some beauty tips from each other after being on the show for three years," she said. "We all know our own skin so well now, and so whatever works for Lili might not work for me because we have completely different skin types. I'm an oily gal; she's not."

For example, Petsch swears by Bioré's Witch Hazel Pore Clarifying Toner ($7), whereas Reinhart has admitted she loves Dermalogica's Clear Start line. "The things that work for her aren't going to work for me, and that's all right." As they say: to each their own.