Johnston made the announcement last night at the Nashville stop of the Florida Georgia Line Dig Your Roots tour.
He followed it up with a performance of “White Lightning,” which he penned about his love for his bride.
“Evyn and I have been together for 15 years,” Jaren says. “We’ve been through so much together but nothing has ever been as exciting as expecting our first baby. We can’t wait to meet this little bad ass in April!”