Olivia Dunne is celebrating the big 2-1 in style.

Taking to her Instagram Stories on Saturday, the famed LSU gymnast revealed her birthday look in a new selfie, modeling a black mini dress with a sparkly Prada purse.

“Bday din fit,” Dunne captioned the snap.

Dunne also posted a separate photo on her actual birthday, Sunday, Oct. 1, as she rocked a white mini dress with a “birthday girl” sash.

It’s been a year to remember for Dunne, who made her Sports Illustrated Swimsuit debut this past spring.

The iconic publication commemorated Dunne’s birthday with an Instagram tribute, a post the LSU senior reshared on her own page.

In addition to SI Swimsuit, Dunne received a slew of well-wishes from her LSU teammates, including fellow senior Elena Arenas.

“Happy Birthday!!! to my bffl @livvydunne,” Arenas posted Sunday.

Arenas and her boyfriend, LSU baseball alum and Tampa Bay Rays prospect Garrett Edwards, played a role in Dunne’s love connection with Pittsburgh Pirates prospect Paul Skenes.

“Just a small-world type of thing,” said Skenes, who was also part of LSU’s baseball team before he was selected first overall by the Pirates in the 2023 MLB Draft.

In an August interview with the Pittsburgh Post-Gazette, Skenes spoke about his relationship with Dunne and their shared experiences with fame.

“It can be a pain in the butt sometimes, to be honest, in terms of actually going somewhere. If one of us went out in Baton Rouge [La.] by ourselves, there’s probably gonna be someone there asking for something — picture, autograph, whatever,” Skenes said.

“It’s nice to be able to have that conversation. She does get it. I do wish she could come to a baseball game and just enjoy it. It does irk me. I don’t have any control over it. She really doesn’t either. I’m sure it’ll get better as I go up levels, but that’s something I want for her.”

Skenes and Dunne’s budding romance continues to ignite buzz on social media.

Just last week, Skenees, 21, posted a cozy snap of the couple taking in LSU’s 34-31 win over Arkansas in Baton Rouge.

“My [heart]!” Dunne reacted to the Instagram post.