Sydney Sweeney Teases an Even Wilder Cassie in ‘Euphoria’ Season 3

Appearing on Jimmy Fallon’s show, Sweeney jokes about Cassie’s chaos, responds to wedding dress rumors, and opens up about her intense new thriller with Julianne Moore.

Sydney Sweeney has officially confirmed what “Euphoria” fans have long suspected — Cassie Howard is about to become even more unhinged in Season 3.

Appearing on The Tonight Show Starring Jimmy Fallon, Sweeney didn’t hold back when asked about stepping back into the chaotic world of HBO’s hit series after nearly a three-year break. “Cassie is crazy,” she declared, drawing loud laughter from the audience. When Fallon followed up with, “So, she still is?” Sweeney simply replied, “Oh, she’s even worse.”

Fueling fan theories further, Fallon pulled out a leaked image of Sweeney on set wearing a wedding dress. The internet has since gone wild speculating about Cassie possibly marrying Nate (Jacob Elordi) in the upcoming season. But Sweeney played it coy. “I can’t confirm or deny,” she said with a smile, teasing, “Who knows, that could be AI!”

Before audiences get to see Cassie’s next breakdown — with Euphoria Season 3 reportedly aiming for a 2026 release — Sweeney is shifting gears in Echo Valley, a psychological thriller now streaming on Apple TV+. She stars opposite Julianne Moore as a daughter who shows up bloodied at her mother’s door, leading to a chilling tale of family loyalty and dark secrets.

Discussing her emotionally charged scenes with Moore, Sweeney admitted to feeling guilty. “I felt so bad. I’m really vicious,” she said. “They say, ‘Action!’ and I’m screaming and crying. Then they say, ‘Cut!’ and I’m like, ‘What’s wrong?’ It’s kind of psychotic.”

With Echo Valley showcasing her range and Euphoria promising even more drama, it’s clear Sydney Sweeney isn’t slowing down any time soon.

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