"Jake and Vienna have split and appreciate the respect for their privacy at this time," the rep tells Us.
Pavelka, 32, surprised fans on The Bachelor last season when he chose Girardi , 24, who often clashed with the other women, over contestant Tenley Molzahn. On the finale, he claimed he was in love with both Molzahn and Girardi, but ended up popping the question to Girardi because he felt more of a spark with her.
Shortly after his decision, he told Ellen DeGeneres he was also impressed by Girardi's "values and spirituality and different things like that ... I just realized, 'Wow, we really line up.'"
"We make each other glow inside and out," Girardi, an ex-Hooters waitress, also gushed to Extra.
The news comes as a surprise as the two seemed tighter than ever: During Pavelka's recent stint on Dancing With the Stars, Girardi was often in the audience rooting him on.
"Chelsie [Hightower, his partner] has been great," he told Us of his final dance on the show's finale. "I really enjoyed it, but dancing with my beautiful fiancee really was special."
Earlier this month, they even took a trip to Disneyland, where Pavelka said he would be happy to wed Girardi in the "land of happies!"
Even though she told E! News they wouldn't wed "for a few years," they were already talking babies as of this past March.
"We want five kids," he said in the E! interview.
No word if she'll be giving back the $50,000, 3-carat ring by Neil Lane she received from Pavelka on the show.
Out of 14, only one successful Bachelor relationship remains: Jason Mesnick and Molly Malaney, who wed this past February. Two couples from the five seasons of Bachelorette are still together: Trista Rehn and Ryan Sutter, who wed in 2003, and Jillian Harris and fiance Ed Swiderski.