The reality TV star and basketball star Kris Humphries - who have been dating since last December - will set up home together in New York after the sportsman asked her to live with him.
A source said: "When he began talking about living together, Kim was thrilled. She feels that getting their own place is a major step toward a real commitment - that they're on the road to marriage. She's excited about decorating the place."
However, while they will live together in New York, Kim will still keep her Los Angeles home and Kris will hold on to his pad in New Jersey.
The news comes after Kim revealed she would "probably say yes" if Kris her to marry him.
When asked what she'd say if he proposed, Kim said: "I probably would say yes. But it's a personal thing. I don't really want to talk about it."
Kim, 30, recently said she can't find fault with Kris and is absolutely smitten with him.
She revealed: "I think I haven't found one thing wrong with him, let's just put it like that."