But ex-girlfriend Oksana Grigorieva is not owed alimony as they were not married, a legal expert says

By Mike Fleeman and Oliver Jones
Updated April 17, 2010 09:00 AM

What’s his latest breakup going to cost Mel Gibson?

According to a family law specialist, the wealthy actor-director-producer will likely pay a large amount of child support to ex-girlfriend Oksana Grigorieva for their 5-month-old daughter, Lucia, but probably has no legal responsibility to make alimony payments, given the fact they were not married.

“This is not dissolution of marriage action. The mother would have rights to child support, which in the case of Mr. Gibson, will be very substantial,” says attorney Steven Knowles, who estimates support of $12,000 to $15,000 a month. “He is what we call a high-income earner, and there is a high-income earner stipulation that says they must pay any amount reasonably necessary for the support of the child.”

But Gibson, who already is in the midst of a divorce from his wife of three decades, Robyn, likely won’t pay alimony to Grigorieva because they were never married, even under California’s famous Marvin palimony laws for unmarried couples.

“Merely living together and having a child does not give the mother any rights to property and certainly no spousal support,” says Knowles, who’s not involved in the Gibson action.

A close friend of the couple calls the split “amicable,” adding, “They’re still friends and they’ll both raise Lucia together.”