How to tell my fiancé I want to have a baby?

So, we have been in a serious relationship and living together for 3 and a half years now, and we are getting married on June 15th. And I have been thinking about children for a while. How would you bring it up? I’m both scared and excited. I know that he wants kids in the very near future, but not sure how he will react when I tell him I am ready now.