Yes there is.
When you are clicked on someone on your tree if they are hooked up to a partner there will be a clickable link labeled Partners. It’s in between Personal and Contact links.
Click on partners there will be a button “Edit Partnership details” a drop box will be available there are six options: Married, Engaged, Relationship, separated, divorced and annulled. When you select one of this options then you can put in dates marriage date (there is even a spot for location of the wedding), engaged, when one’s relationship started, divorce date etc.