The busty blonde regularly shows off her curves in sexy outfits onstage, but she insists she has no intention to ever strip for the camera, no matter how artistic or important it is to the movie's plot.
She tells Allure magazine, "I will never do nudity. I don't care how dark and intellectual the role could be... I don't care if I frickin' could get an Oscar for it, I'm not going to do it. Those accolades mean nothing to me."
And Simpson, whose father Joe is a Baptist minister, has promised to keep her assets under wraps, joking that only her future second husband will get to see her in all her glory.
She adds, "I don't think people deserve to see what's under my clothing. That's only for my next husband!"
And it appears her next husband is in for a real treat - not only does she look great naked, she's a terrific performer in the bedroom, according to ex-boyfriend John Mayer.
In a recent Playboy magazine interview, the rocker described Simpson as "crazy" in bed and admitted he would happily pay for sex with the star because she was like "sexual napalm" in bed.