Danielle is dating former Big Brother houseguest Paul Calafiore, a fitness coach and gym owner from New Jersey who appeared on Season 18 of Big Brother in 2016.
The couple decided to go Instagram official on Monday by sharing sweet photos of themselves from a wedding in Nashville, TN.
Danielle, 31, posted two Polaroids showing herself sitting on Paul's lap and kissing him at the wedding, and she captioned the image, "Melting" with a heart emoji.
Meanwhile, Paul shared a similar photo and wrote alongside it, "Wedding season," with a heart as well.
Danielle's friends and former The Bachelor and Bachelor in Paradise co-stars were quick to comment on the pair's new public romance.
"Yes yes yes let the world know. So happy for you and your happiness," Kristina Schulman wrote on Instagram.
And Danielle's longtime friend, Wells Adams, wrote, "This makes me very happy!!!!"
Rumors swirled in August 2017 that Danielle, a neonatal nurse, and Wells, a radio deejay, were dating after sharing a steamy kiss in Mexico on Bachelor in Paradise 4 last summer, however, a romantic relationship never seemed to come to fruition.
"We went on a date [four] years ago and nothing ever materialized from it, so it was one of those things where we gotta see what it is like. When she was leaving, it was like, 'I might as well do it now,'" Wells previously explained to Glamour of the unexpected kiss, according toUs Weekly.
"Yes, there's definitely hope for us. Everyone needs to put everything into perspective, though. Everyone was dating on the show and being romantic. Our little story started at the end of it [when she was about to leave]. And then she went to Africa for a couple weeks, so we were way behind."
In December, Danielle told Us that she was "so happy" for Wells and Sarah and believed they're a great match.
Prior to her attempt at finding love in Paradise, Danielle competed for Nick Viall's heart on The Bachelor's 21st season.
As for Paul, he memorably had a rocky showmance with his fellow BB18 houseguest Zakiyah Everette, who briefly felt that Paul had screwed her over in the game.
By the end of the Big Brother season, Zakiyah's friends in the house criticized her for getting back together with Paul while in the jury house.
Paul -- who was 27 years old at the time of filming and called himself "Paulie" -- had become a villain by that point in the season due to some controversial comments he made about women in the house, especially Natalie Negrotti.