10/13/2011 04:21 pm ET | Updated Dec 13, 2011

'Twilight' Star Cheske Spencer Talks Taking It All Off

"Twilight" star Cheske Spencer knows a thing or two about taking it all off for the role of a lifetime. I caught up with the werewolf hunk to talk about stripping down and the much anticipated sex scene between Edward Cullen and Bella Swan.

“He breaks the headboard or something,” Spencer reveals about the racy scene that he tells me was shot on a super closed, private set. "In fact, so few people had access to the filming that everyone in the cast, with the exception of Robert Pattinson and Kristen Stewart, saw the scene only when a short clip of it ran in the upcoming movie trailer.”

And while it might seem like fun running around with the pale and beautiful few, Spencer admits that a lot of hard work goes into looking that good.

“As soon as we got the job, we had to take our shirts off. And they were like, ‘Alright, we gotta get trainers for these guys.’ In a matter of three weeks, I put on almost 15 to 20 pounds of muscle,” Cheske tells me on Thursday night's episode of my talk show, "Naughty But Nice With Rob." "It was a hard workout. It was circuit training, plus three protein shakes a day, plus eating a strict diet. You maintain that and I’ve been involved almost three years. In the beginning, especially in the makeup trailer, we were all checking us out. It was bad, but we keep each other pretty level-headed.”

For my entire interview, plus more secrets from the upcoming "Twilight" film, check out HDNET's "Naughty But Nice With Rob" Thursdays at 8:00 p.m.