"Jake and Vienna have split and appreciate respect for their privacy at this time," a representative for the couple confirmed to OK! Weekly on Monday.
Rumors of a spilt first surfaced on Saturday at the Children's Hospital of Orange County Oncology Prom near Los Angeles when Girardi allegedly told actor Gregory Michael that her engagement to Pavelka was off.
"We hit it off and hung out and danced the night away," Michael told OK! about Girardi. "She made it very clear that it was over with Jake."
Pavelka presented his final rose and a marriage proposal to Girardi -- and she accepted both during March's The Bachelor: On the Wings of Love finale broadcast, which filmed last fall.
"We are officially engaged. It wasn't for TV or for show," Pavelka told reporters after the finale aired.
"However it was an accelerated journey. We don't have a date yet and we want to get all of the little moments that build a relationship. We're engaged, but we haven't seen our first movie yet! We've got a lot of catch up to do. But we're so far ahead of the game, I could marry her right this minute."
The couple stayed together in Los Angeles while he competed on Dancing with the Stars tenth season, in which he finished seventh with professional partner Chelsie Hightower.
Pavelka and Girardi also performed a routine to Jeffrey Osborne's "On the Wings of Love" during Dancing with the Stars tenth-season finale late last month.
While the couple never publicly revealed a wedding date, Girardi told E! News late last month that they would "probably" wed next year "during the summer months."
An ABC representative did not respond to OK!'s request for comment.