Remember when Zendaya was a teenager on the Disney Channel? Well, now she's a 22-year-old and stars in an explicit new HBO series.

The show, "Euphoria," which premiered Sunday night, features the actress as Rue, a 17-year-old recovering drug addict who returns to high school after rehab. In the first four episodes that we've seen, the show depicts all manner of explicit content: underage sex between a teenage girl and a much older man, a high-school girl who makes money showing off her body on webcam, a graphic guide to different types of penis pictures, and multiple closeups of male genitalia during a rowdy locker room scene.

Zendaya knows that the series is a departure from her "Shake It Up" days. Over the weekend, she embraced her career turn while also issuing a warning to young fans about the "mature" content in her show.

"Euphoria" is "a raw and honest portrait of addiction, anxiety and the difficulties of navigating life today," she wrote in an Instagram post. "There are scenes that are graphic, hard to watch and can be triggering. Please only watch if you feel you can handle it."

Fans on Instagram filled the post with supportive comments.

Halle Berry sent heart emojis. "New Chapter," wrote supermodel Winnie Harlow. "Congrats!" wrote singer Big Sean. "CANT WAIT !!!" added designer Jeremy Scott.

Some viewers on Twitter still joked about how it was jarring to see Disney darling Zendaya, who also stars in the upcoming "Spider-Man: Far From Home" (out July 2), do drugs in "Euphoria."

On Sunday night, Zendaya tweeted about how grateful she was for her new show's support.

Contributing: Patrick Ryan