Ashton Kutcher: Demi Moore "Becomes More Beautiful to Me by the Minute"

Demi Kutcher? Not so fast. Ashton Kutcher says he can't confirm a new round of Internet reports that claim his wife Demi Moore is taking his name to celebrate their fourth wedding anniversary in September.

See Ashton Kutcher and Demi Moore's most romantic moments

"She hasn't told me, so you might be revealing a secret," he told Usmagazine.com Monday at the Los Angeles premiere of his new comedy Spread. "I think it would be fantastic, but at the same time, it's a name, you know? Like, call me Mr. Moore, I don't care. I've been called a lot worse!"

Can you spot Demi Moore's bikini bod in this gallery?

He adds that his wife, who turns 47 later this year, continues to wow him.

Asked how she still manages to look good after all these years, Kutcher told Us, "I don't know. I'm trying to figure it out because she becomes more beautiful to me by the minute and I don't know what it is. She's got the magic thing."

Can you believe these stars are in their 40s?

In his new flick, he shoots some steamy love scenes. But he said his wife doesn't give him a hard time.

"You go to a movie and you have to shoot somebody with a gun and you've got to murder somebody in the film. When you go home, your wife doesn't think that you're a murderer, right?" he explained. "You go to work and you have a scene where you have to portray having sex with somebody; your wife doesn't think you're going to work having sex with somebody. We're both in the same craft. We understand what our job is, and we do it."