Nicole Kidman is expecting her first child with husband, Keith Urban.

Daily Mail reports that they made the announcement to their families over the Christmas holiday.

Kidman and Urban were married in June of 2006. Their prenuptial agreement reportedly states that she would pay him $600,000 for each year of their marriage. However, he would get nothing in divorce if he started using cocaine again or drank excessively.

Four months into the marriage, Keith suffered a relapse and checked himself into a rehab center where he stayed for almost three months. Nicole remained unconditionally at his side.

Her relationship with Isabella and Conner, her two adopted children from her marriage to Tom Cruise, has been a highlight in the news recently.

Kidman told the British talk show GMTV that her kids don’t call her “Mommy” or “Mom.” They instead tend to call her by her first name.

A December interview in Parade Magazine quoted Katie Holmes, Cruise’s current wife who gave birth to their first child, Suri, as saying that Isabella and Connor call her ‘Mom.’

Only time will tell how this all plays out between Nicole and Keith, Tom and Katie in terms of ”yours”, “mine” and “ours” where the children are concerned.