1 of 5
"I'm not a calorie counter by any means and I don't run. I despise running," Lutz, 25, says of how he stays so sculpted. But the Calvin Klein model – who plays brawny vampire Emmett Cullen – has a few tricks up his sleeve. "I cut back on my candy intake."
2 of 5
Meraz, 25, has a philosphy about all the shirtless time he clocks in Twilight as wolf Paul: "It's like a costume. You wear it and you own it. You can't be intimidated about your body."
3 of 5
Turns out Bewley, who plays Demetri, a member of the vampire ruling clan the Volturi, has a strange signature trait he looks for in a woman. "There is one physical feature," the 29-year-old Brit says. "That they have a disproportionately large head."
4 of 5
To maintain his on-set energy, the 35-year-old (who portrays wolf-pack leader Sam Uley) would "watch films like Lethal Weapon," he says. "It would keep the testosterone going."
5 of 5
"I've always experimented with different looks," says Rathbone, 25, who plays the quick-tempered Jasper Cullen in Eclipse. "That's why I guess I'm a character actor."