The 27-year-old star's onscreen chemistry with Lea Michele, 23, is just an act.
"We're great friends. We've become really close over the show, but we're just friends. We're not dating," the actor, who plays McKinley High's quarterback Finn Hudson on the FOX show, said Thursday at the Marshalls and T.J. Maxx "Carol-Oke" contest at New York's Bryant Park.
On Glee, Monteith's Hudson and Michele's neurotic and self-proclaimed star Rachel Berry are involved in a complicated love quadrangle that also includes former Cheerios cheerleader Quinn Fabray (Dianna Agron) and footballer Puck (Mark Salling). It's messy with pregnancy, lies and two baby daddies for one baby. Confused? So are their characters.
One thing that Monteith thinks would make matters worse: Transporting their relationships from the small screen to reality – like Gossip Girl's Penn Badgley and Blake Lively.
"That seems really difficult. That seems like it would be tricky," Monteith said.
Salling, on the other hand, only wants to keep the rumor mill running.
"It's all true. Every little word is true," he says of the behind-the-scenes relationship stories. "Every little thing you read in those magazines is true. Spot on."