In a divorce, what happens to a house that was purchased prior to the marriage?

Question Details:

I purchased my house prior to being married. My name is the only 1 on the mortgage. I have owned the house for 5 years. My spouse has paid a portion of the mortgage. Divorce has come up. Would my spouse "own" a portion of the house if we go through with the divorce? We have been married a little over 4 years. Important Notice