Sydney Sweeney is dishing on an infamous scene from "Euphoria" that viewers likely still can't get out of their heads.

The "Anyone But You" actress, 26, on the latest episode of First We Feast's "Hot Ones," walked host Sean Evans through the notorious hot tub scene from Season 2.

One of the season's storylines followed Sweeney's Cassie as she betrays her best friend, Maddy (Alexa Demie), by secretly sleeping with Maddy's on-again-off-again boyfriend, Nate (Jacob Elordi). As Cassie is forced to watch her best friend and lover together one night, she turns to drinking. Later, as Maddy and Nate argue, Cassie dramatically cries and vomits in the water of the hot tub.

During the interview, Sweeney revealed how the gross scene was created, noting it was "a lot of work."

"Euphoria" director Sam Levinson "just wanted vomit everywhere, so they had to get a pump," she said. "And they had this pipe that they just taped and hid on my body."

Sweeney said production edited the scene using computer-generated imagery, or CGI, to remove the pipe from her neck "and then there was a horse bit that I had to put in my mouth. And so during that scene, they’re filling my mouth with throwup."

She continued: "And then I opened my mouth, and it just starts shooting out my mouth. And it was the most disgusting thing I ever experienced."

Sweeney also got into her other roles — including Olivia Mossbacher in "The White Lotus," Eden Spencer in "The Handmaid's Tale" and her upcoming role as Julia Carpenter in Marvel's "Madame Web" — and her acting technique of writing journals as each of her characters.

But she said Cassie was the journal that had the most potential as a "personal memoir."

"Cassie's book is really, really cool. It's the most developed, 'cause I've had so most time with her," Sweeney said. "I have two seasons of her, so she's grown so much. And I was able to have Season 1 and Season 2 and just develop this book, so it's really cool to see how it changes."

Season 3 of "Euphoria" is expected to be released in 2025.

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