Once upon a time in Utah, Sydney Sweeney celebrated her birthday in a series of swimsuits.

The “Euphoria” star shared sultry bathing suit snaps via Instagram on Sunday from a recent getaway with her pals.

The actress, 28, kicked off the carousel with a photo of herself standing on a rock in a black one-piece with a plunging neckline.

She wore the same swimwear while cliff jumping in a separate slide.

More pics showed Sweeney posing from behind in a white thong bathing suit, as well as shimmering in a cheeky gold bikini and cowboy hat.

The “White Lotus” alum also posted an impressive video riding a jet ski and letting go of the handlebars, arms flung wide.

Additionally, Sweeney rounded up mouthwatering meals, including truffle pasta and an ice cream cookie skillet.

Sweeney, who turned 28 on Friday, rocked a colorful “Happy Birthday” tiara as she enjoyed the latter.

“Little trip to mars,” she captioned the vacation photos.

It is unclear whether Scooter Braun, whom Sweeney has been casually dating, joined her on the trip.

The two did spend Labor Day weekend together on a lakeside California trip, People reported earlier this month.

“He’s loving spending time with her and seeing where things go,” a source told the outlet at the time.

Page Six hears that Braun, 44, became “obsessed” with Sweeney after getting to know her at Jeff Bezos’ wedding to Lauren Sánchez in June and has been “pursuing” the “Handmaid’s Tale” alum ever since.

“It’s still new,” one source told us, noting that the situation has escalated beyond a hookup.

Sweeney, who has been busy promoting her latest film, “Christy,” ended her engagement to Jonathan Davino in May after seven years together.

The duo had been engaged since 2022.

Braun, for his part, split from ex-wife Yael Cohen in 2021 and finalized their divorce the following year.