'Euphoria' star Barbie Ferreira says she knew that Kat and Ethan's relationship wasn't going to last: 'She is a restless teenager'

• Warning: There are major spoilers ahead for season two of HBO's "Euphoria."
• Barbie Ferreira told Insider that she knew Kat and Ethan's relationship would go "downhill."

"Euphoria" star Barbie Ferreira said that she wasn't surprised at all that Kat and Ethan broke up on season two of the hit teen drama.

"I definitely expected it," Ferreria, who's promoting her partnership with Coors Light, told Insider on Thursday.

Ferreria currently stars as a teen named Kat Hernandez on HBO's gritty, critically acclaimed series that centers on the lives of young people navigating sex, drugs, relationships, and more.

Season one, which premiered in June 2019, showed Kat trying to figure herself out, mostly through creating online identities — first, as a Tumblr-famous fan-fiction writer and, later, an underage cam-girl. She adopted a new personality, new attitude, and new look as she began building an empire with her cam-girl persona.

Kat's relationship with Ethan (played by Austin Abrams), who she first met in biology class, also blossomed during the first season. But in season two, Kat grappled with feeling unsatisfied by their romance, which turned out to be too sweet and wholesome for her.

Ferreira told Insider that to her knowledge, Kat's main season two storyline was always going to be about her declining interest in Ethan and their relationship.

"With Kat, season one, you get to see that she is a restless teenager," the actress said, explaining that similar to the other characters of the show, she "doesn't know who she is."

In season two, episode six, Kat and Ethan break up after she lies about having an "illness" and tries to gaslight him.

"I definitely knew that the Ethan thing wasn't gonna last, in true 'Euphoria' fashion," Ferreira said. "Being happily in love, I don't think was very much in the cards for Kat because she had just started that journey of kind of understanding what she wants and who she is."

"She went really off the deep end when she started falling more and more into her internet alter ego, the star said, referencing season one. "So, I definitely knew that the Ethan-Kat relationship was gonna go downhill."

Ferreira said that the end of the relationship is mainly attributed to Kat's own disquiet as she tries to figure out what she wants.

"I know people like Kat and Ethan together, but I feel like that was always in the cards," she said. "And it's more of a reflection of two teenagers who are not on the same page and on the same timeline and really has nothing to do with either character being not good for each other. It's more of just the restlessness, the whole sense of having serotonin spikes and power dynamics and everything."

Ferreira said that she wants to see more of her character's "internal fantasy life" explored in season three of "Euphoria."

"I hope to see her relationship with herself, the internet, with her friends," she said. "I hope to see everything beautifully devolve as it always does on 'Euphoria.' I'm excited to read it. I don't think it's written yet, so I'll be waiting."

It's unclear when season three will begin filming, but Ferreira will be keeping busy with her upcoming role in Jordan Peele's film "Nope" (in theaters on July 22) and her partnership with Coors Light.

The company recently pledged to be more environmentally conscious and sustainable by taking steps to eliminate plastic rings from all packaging globally.

Ferreria said that she comes from "a family of beer drinkers" and has been taking small actions of her own to eliminate her environmental waste, which is why this partnership with Coors Light was such a natural fit.