The `Twilight Saga` actress - who is dating her co-star Robert Pattinson - is inspired by her parents` stable relationship but is not ready to walk down the aisle just yet.
She said: "I`m not ready to get married, but I have a really great family and I-d like that too someday, sure.
"I believe in marriage. Whatever you want to do, you know?"
The 20-year-old star also admitted her parents never had to talk to her about sex growing up as she already "knew everything".
She said: "I knew everything from the word go. I`m really, really mature that way. I never had `the talk`. I could never have `the talk.` I didn`t need it."
Meanwhile, Robert, 24, has opened up about the differences between himself and Kristen, admitting the couple have opposite approaches to tackling their movies.
He explained: "Kristen`s mind works completely differently so she feels things immediately and I like to be much more cerebral about things. I`m the complete opposite of Kristen. I don`t feel confident unless I know more about the reasons to be doing things."