• Euphoria's third episode focused on Kat, played by actress Barbie Ferreira.
• The episode follows Ferreira's Kat as she delves deeper into life as a cam girl.
• Here's what to know about Barbie Ferreira.

One thing we love about HBO's Euphoria is that it follows the Lost model of focusing on a different character with each week. Zendaya's Rue was at the center of the first episode, before ceding the spotlight to Jacob Elordi's Nate -the violent jock with a secret-in episode two.

Week three shifted the spotlight over to Kat, played by 22-year-old actress Barbie Ferreira. We learn about her childhood, her teen life, and the stark differences between her online life-writing very dramatic, very racy One Direction fan fiction-and her lonely real life. Episode three finds Kat venturing delving deeper into online "cam girl" life. We're interested where Kat's story goes from here, but in the meantime, let's get to know Ferreira, who was relevant in her own right even before Euphoria hit the airwaves.

Here are four things to know about Barbie Ferreira.

Ferreira is a model who advocates for body positivity.

Much like her character, Kat, Ferreira has used the internet greatly to her advantage. After initially bursting onto the scene by sending her own photos into American Apparel (where she worked in a store location), she eventually went viral after her untouched photos were featured in a campaign for Aerie.

"What makes me #AerieReal is that I'm unapologetically myself, no matter what anyone's opinion of me is," Ferreira said in a video for the campaign, embedded below. "Not being retouched in the images is something that is very important to me-people knowing that that's what I look like, without anyone's perception of what my body needs to look like."

Ferreira got lots of good press for the #AerieReal campaign, and even landed a spot on TIME's 30 Most Influential Teens of 2016 list . "No one on TV or in the magazines looked like [Ferreira] did with a curvy frame," TIME wrote."But then she landed a gig fronting a new campaign for American Eagle loungewear brand Aerie, and now her image inspires girls around the world."

Ferreira also advocates for body positivity on her Instagram account, where she has more than 500,000 followers.

She's hosted online series on Teen Vogue and VICE.

Before taking her acting presence to HBO, Ferreira made her presence felt with a pair of video series for popular online brands Teen Vogue and VICE. Her Teen Vogue series, Body Party , focused on "the various facets of her own mantra of body positivity," as an article published along with the series' launch described, along with noting that the series would follow Barbie as she "banishes misconceptions along with the badass women shes collected in her life."

She also had a series on VICE's Broadly vertical called How to Behave. This series found her tackling a different topic in each video, from ' A Guide to Getting More Money, ' 'A Guide to Body Positivity ,' and ' A Guide to Healthy Sex. ' The series was eventually nominated for a Webby Award , which honors the best in online content.

Ferreira isn't new to HBO.

While her role as Kat is her first main cast role, Ferreira had already made her HBO debut in 2018, appearing in a pair of episodes in the second season of Divorce, HBO's half-hour comedy series that stars Sarah Jessica Parker and Thomas Haden Church.

She's a born and bred Tri-Stater.

If it seems like Ferreira has a bit of New York toughness to her, you're probably onto something-she was born in Queens, before relocating to Maywood, a town in Northern New Jersey, and attending Hackensack High School .

Ferreira is thrilled about the response to Euphoria so far.

While Euphoria got headlines at first about its provocative content, Ferreira has been very happy with the response to the show in the weeks since it's launched. "We were getting press about nudity and whatever, and it made me nervous because we put our heart and soul into it," she told The Hollywood Reporter in an interview. "Im so happy that as soon as it came out, the amount of thinking, the amount of conversations, the amount of people really relating to it."