Goldie Hawn: Why Kurt and I Never Got Hitched

Goldie Hawn and Kurt Russell have a child together, and a relationship that's lasted more than 30 years, but no marriage certificate. "A lasting relationship isn’t about marriage. It’s about compatibility and communication," Hawn, 69, explains in a new interview with Porter magazine picked up by ABC News. "And you both need to want it to work. If one person does not want it to work, it isn't going to work. Intention is the key. It's also about not losing yourself in each other. Being together, two pillars holding up the house and the roof, and being different, not having to agree on everything, learning how to deal with not agreeing. Everything's a choice."

And for her and Russell, she continues, the most important thing is family, which also includes their three other children from previous relationships. She says they both came from "strong" and "big" family units. "That's what we care about. We talked about relationships and commonality early on. We had nannies, there's no doubt about it. We've both been working. But we were very present with our children. It's the same way we grew up. I had a working mother, Kurt did not. My mother was right there." (Click to read about eight more celebrity couples who have yet to wed.)