Mahomies are broken-hearted.

Camila Cabello of the girl group Fifth Harmony has confirmed that she is dating teen heartthrob Austin Mahone during her appearance on Bravo's "Watch What Happens Live" Tuesday, Nov. 4, with her four fellow group members, Normani Hamilton, 18, Ally Brooke, 21, Lauren Jauregui, 18, and Dinah Jane Hansen, 17.

Andy Cohen first asked the girls if they have ever dated any of the 5 Seconds of Summer members, and when they answered "no," the 46-year-old talk show host quizzed them further if any of them have "snagged any of the 1D guys." And when the fivesome responded "no again," that was the time Cohen asked them, "Who's the Mahone girlfriend?" according to the Hollywood Life.

"That would be me," the 17-year-old Cabello replied, raising her right.

"Oh my God!" Cohen exclaimed. "So you are indeed a Mahone, of course."

"Uh, a Mahomie," she corrected the host. "Oh yeah, he's a really good guy."

Asked if how long they have been together, Cabello answered, "Um, um, I dunno, I mean, I think we've known each other for a really long time, we've known each other for like, a year and a half now, like since we were, like on 'X Factor' was one of the first."

"My God, that's forever!" Cohen commented.

"That was my way of dodging the question," Cabello quipped.

Mahone, 18,  took the opportunity to confirm their relationship himself via Twitter shortly after the episode was aired. "Like you guys didn't know already," he tweeted.

Cabello seemed to have caught the attention of the "Mmm Yeah" singer in 2012, when Fifth Harmony was competing on the second season of "The X Factor," E! News reported.

"@camilacabello97 Hey gorgeous! Good job tonight. I voted for you," Mahone tweeted on Dec. 20 of that year.

Cabello and Mahone met for the first time at the 2013 MTV Video Music Awards, Us Weekly reported.