The Zac Brown Band family is growing! ZBB member Clay Cook and his wife Brooke are expecting a child.

Cook shared the happy news on his Instagram account on Thursday night (May 5): He posted a photo of his wife (and her growing baby bump!), along with a caption that reads, in part, "She's going to be the best Mommy EVER!!! I'm so damn lucky in this life."

There is no word on when the new baby is due. Cook and his wife have been married since 2014.

Zac Brown Band recently released a new single, "Castaway," from 2015's Jekyll + Hyde. Their previous single from the album, “Beautiful Drug,“ became the group's 13th tune to hit No. 1 on the Billboard Country Airplay chart, making the band the country group (three or more members) with the most career No. 1 singles on that chart.

On May 12, ZBB will kick off their 2016 Black out the Sun Tour. Dates are currently scheduled through early September.

2016's Country Music Babies