Ashton Kutcher has vowed never to act alongside wife Demi Moore, because their lives are already like a soap opera.

The What Happens In Vegas star is worried the couple wouldn't be able to separate real-life from fiction onscreen.

He says: "I'd do a movie with her if our characters weren't interacting. Our lives are like a soap opera, and I think it would be hard for people to disconnect from work and real life."

Would he take on a role opposite step-daughter Rumer though?