We’re only in Week 2 of Dancing With the Stars Season 15 All-Stars, but already Val Chmerkovskiy and his partner Kelly Monaco have broken out as the ‘Are They Or Aren’t They?’ couple of the season. Like Maria Menounos and Derek Hough and Erin Andrews and Maksim Chmerkovskiy before them, Val and Kelly have undeniable chemistry on the dance floor, prompting lots of speculation that the two could be more than just dance partners.

To get the answer, we turned to a backstage source on the show. “The vibe between them is HOT,” the source tells Wetpaint Entertainment. “Everyone’s talking about it.”

“And they’re very, very flirty with each other in rehearsal,” adds the source. “I can tell you that much. They have a good time.”

But they haven’t crossed the friendship line…yet.

“Right now, Kelly is seeing someone,” the source explains. “But if things don’t work out, I can totally see something happening down the line with her and Val. Definitely not until the show is over, though. They’re in this to win it and I don’t think either of them wants to take the focus off that. They’re dead serious about taking home the Mirror Ball.”

“But in terms of hooking up, never say never – especially in this case.  The kind of chemistry they have, you can’t fake that.”

Catch a new episode of Dancing With the Stars Season 15: All-Stars on Monday, October 1 at 8 p.m. ET/PT on ABC.

Follow Beth Sobol on Twitter @bethieso.

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Credit: YouTube Photo: DWTS All-Stars: Kelly Monaco and Val Chmerkovskiy's Super Sexy Week 1 Cha-Cha (VIDEO)