updated 02/13/2012 AT 12:15 PM ET
•originally published 02/13/2012 AT 1:15 PM ET
The duo’s female half, Joy Williams, announced her pregnancy on Friday by Tweeting, “Beyond elated to share that [husband] Nate [Yetton] & I are expecting our first child in late June!!! My baby bump & I will see you on the red carpet.”
Williams, 29, and partner John Paul White picked up awards for best folk album and best country duo/group performance at Sunday’s show.