"I'm not one of those girls who sits at home thinking, 'By 25, I have to be married'. Right now, I'm like, 'I'm 25 -- I need to book my next movie!'," said Greene.
The actress pointed out that her "parents have such a beautiful marriage," which is why she's "not someone who takes it lightly. I'm not going to get married until I know I'll be with someone forever."
When it comes to dating, "The Apparition" actress, who's still going strong with Broadway star Reeve Carney, says her taste in men has evolved, reported Us magazine.
"It's about chemistry and a connection," said Greene, whose ex-boyfriends include singer Joe Jonas, 22, actor Chace Crawford, 26, and rocker Jared Followill, 25.
"I've changed so much over the past 10 years. What I wanted when I was 16, I didn't want when I was 20, and that's changed to something else now that I'm 25. Having a type is not for me," Greene said.
R&B star Rihanna and rapper Drake are leading the MTV Video Music Awards (VMA) nominations with five nods each.