Kellan Lutz and Peter Facinelli in a Tub

The tabloids are all over a photo of Twilight costars Kellan Lutz and Peter Facinelli holding hands as they walk through an airport ... and Lutz says there's more where that came from.

"That one is fine," Lutz told Mark Malkin at the New Moon premiere. "It's the naked one of us in the bubble bath that would really get us into trouble."

All kidding aside, the pair say the pic was snapped back in April. Facinelli linked to it on Twitter after a photo of costars Robert Pattinson and Kristen Stewart holding hands began to circulate.

"Co-stars caught holding hands," he tweeted. "Guess this picture proves everything."

Facinelli said the picture was staged all in good fun.

"We were coming off a plane and the paparazzi were all over us so we were just being goofy," he said. "At one point, we even pulled out a Twilight book and started reading it. If they wanted a circus, we were going to give them a good show."