Is it a Glee-mance? That's the claim from this week's Us Weekly magazine. An item claims Naya Rivera and Mark Salling aren't faking their onscreen chemistry as they are getting cozy off screen as well.

The report claims though the pair — whose high school characters hook up on Fox's hit Glee — have brushed off rumors they're dating ("I think Mark's a great guy," was all Rivera, 23, would tell Us in April), a source confirms to Hot Stuff they're an item.

"They've been together nine months but got serious in the last three," the insider says. Indeed. On May 19, the twosome danced at the Maxim 100 party in L.A. "At one point, a girl yelled out, 'You look so cute together,'" says a clubgoer.

"Mark just smiled awkwardly."

The report adds: Three days earlier, the pair dined with pals at a Sushi Samba in NYC. But though they were with friends, "they only had eyes for each other," a source says. "Then they left in a cab together before everyone else."

Source: National Ledger