The Good Charlotte frontman says the couple will definitely tie the knot, but only after Nicole has delivered their first child.
He told U.S. radio DJ Ryan Seacrest on Tuesday: "Obviously marriage is in our future. I don't know when or how, but right now our priority is our family and the baby.
He said: "We are waiting to find out if it is a boy or a girl. We don't even know. So right now it's an 'it', which sounds wrong. We call it the baby. "
"The baby has started kicking and I already went to Target and got a stroller and a playpen for the nursery."
Joel and Nicole, 25, have been together since early this year, and announced in July they were expecting their first child.
Joel and Nicole, 25, have been together since early this year, and announced in July they were expecting their first child.
