Nastia Liukin has quite the little Mirror Ball tucked on her finger.

The 25-year-old Liukin showed off her engagement ring from boyfriend Matt Lombardi in an Instagram post on Monday night after he popped the question to her in Boston, the Olympic gold medalist told Today.com.

"So this just happened..." she captioned the photo of her pink manicured hand wearing the gorgeous diamond ring that Lombardi designed himself. In the background stood her fiancé Lombardi with his hands raised in the air.

 So this just happened... @mattlombardi24

A photo posted by Nastia Liukin (@nastialiukin) on Jun 1, 2015 at 5:10pm PDT

Following the proposal, the newly engaged couple then went to celebrate with family and friends.

"He told me we were going to celebrate together, and to my surprise, my parents, best friend and his family and best friend were waiting there to celebrate with us. We are both very excited for our future together," she told Today.com.

Lombardi is the co-founder of Venture Up, a team-coaching platform for athletes. In addition to competing on this past season of "Dancing with the Stars," Liukin is studying sports management and psychology at New York University.