Demi Moore says the age gap between her and husband Ashton Kutcher never worried her.

The Hollywood star - who, at 45, is 15 years older than Ashton - can't understand why people were so shocked by their romance.

She said: "People made such a fuss about my relationship with Ashton. You would have thought they had never seen it before. Age wasn't what I was thinking about, but to the rest of the world it was a very big deal."

Ashton also revealed he makes sure he spends as much time as possible with Demi when he is not working.

He told Harper's Bazaar magazine: "I have a rule for myself when I am not on location shooting - that I am home for dinner for six o'clock every night. I think that's very important and I stick to it."

Demi and Ashton first began dating in 2003 and married at Los Angeles' Kabbalah Center in 2005.

The 'Striptease' actress has three daughters with her ex-husband Bruce Willis - Rumer, 19, Scout LaRue, 16 and 14-year-old Tallulah Belle.