The South African star, who lives in the U.S., has long claimed she will not wed until marriages between gay partners is made legal in all American states.
But when quizzed during a candid chat with CNN's Piers Morgan over whether she wants to get married, the Oscar-winning beauty insisted she has no urge to become a bride.
And the star - whose mother shot and killed her father in self-defence when he attacked her - is adamant her parents' bad marriage is not the reason she is so against the tradition.
She says, "It's (marriage) a divine right and when (the) government starts to tell us who can love and what is good love, whether government or a government built on a certain religion, I do have a problem with that... I do have a problem with the fact that our government hasn't stepped up enough to make this federal, to make this legal.
"I'll be the first to say, here on your show, marriage - before I felt this way about this issue - was never something that was important to me. I don't know the exact reason for that, some would say it's because I came from a very troubled marriage, my parents didn't have a good marriage. But I don't think it's that, I know a lot of friends who come from divorced parents or bad marriages who don't feel that way. I really want for myself a long-term relationship and I have been in long-term relationships... That's the kind of union that I want. The actual ceremony is not something that is important to me - but I see the importance for other people.
"I don't (see myself getting married). When you're in a partnership with someone, you have to respect the way that person feels... I treat my relationships as marriage, I really do."
The actress split from Stuart Townsend last year (10) after almost a decade together.