Ashton Kutcher In Awe Of Beautiful Demi

Ashton Kutcher thinks Demi Moor gets "more beautiful by the minute".

The actor has no idea how his actress spouse - who at 46 is 15 years his senior - manages to continue looking good as she gets older.

He said: "I don't know - I'm trying to figure it out. I so see it, man. She becomes more beautiful to me by the minute, and I don't know what it is. She's got the magic thing."

Ashton's new movie 'Spread' features several sexual encounters and, despite Demi making several visits to see him on set, the actor insists she doesn't mind him filming love scenes.

He explained: "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?

"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."

Ashton also admitted he is unsure whether there is any truth in the rumour Demi is planning to take his surname to mark their fourth wedding anniversary in September.

He said at the Los Angeles premiere of 'Spread': "She hasn't told me. 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!"

When quizzed on the speculation, Demi posted on her Twitter page: "I am officially married so thereby I am Mrs Kutcher."