Kellan Lutz and AnnaLynne McCord a secret?

Best known to the world as Emmett Cullen from ‘Twilight,’ Kellan Lutz may have a less well-known role as the close ‘friend’ of 90210 actress, AnnaLynne McCord,…But the two try to keep it concealed.

Kellan, 24, met McCord on the set of 90210, where he played George Evans to her Naomi Clark. They’ve been spied out together at countless celebrity balls ever since…But both are eager to deny an affair.

A recent appearance at the party for ‘Social Life’ magazine, however, has weakened their chances of being believed.

Despite co-starring on the cover with heiress, Lydia Herst, Kellan refused to be snapped with AnnaLynne, 22, at the party – ignoring the fact that his ‘secret’ companion had borrowed $300,000 of rare diamond jewelry for just such a chance.

But in private the story had changed, “At one point, they went into a room arm-in-arm,” says a spy. “And Lutz announced, ‘We’re looking for a place to f—!’ Someone pointed to a bathroom, and they went in.”

The secretive pair were also together at the ‘Axe Body Spray lounge’ in Southampton, then they partied in public — again, very close — at New York’s Montauk Yacht Club, in the uber-rich Hamptons.

Regardless of this, Kellan’s deep in denial, “I am quite single. I’m a relationship guy, but I recently broke up with someone I really loved,” he told News reporters. “And if that didn’t work, how could anything else?”

Me-thinks he does protest too much. If you can believe him, let’s hear your views…