Congratulations are in order for Zac Brown Band's Clay Cook, who is expecting his second child with his wife, Brooke! The couple shared the big news on social media.

In an adorable photo posted on Instagram, Cook and his wife are seen reading a perfect book to their son, Charlie: Berenstain Bears' New Baby — apparently their son's new favorite bedtime story. "Our book-loving kid has a new favorite," Cook writes with the photo. "I think it’s safe to say he’s pretty excited about this one."

"So happy to announce that Charlie has a sibling coming this summer!" the ZBB star adds. "We couldn’t feel more lucky to be growing our family." Charlie is Cook and his wife's first child, born in November of 2016. The couple married in 2014.

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Before they welcome their second bundle of joy this summer, Cook will hit the road with his bandmates as part of the Down the Rabbit Hole Live: Zac Brown Band 2018 Tour. The 27-date tour includes two performances with iconic rock band the Eagles. The tour marks the band's eighth headlining tour in North America. Tour stops include Fenway Park, Citi Field, and Hersheypark Stadium, among others. They'll be bringing along openers OneRepublic and Leon Bridges for the tour.

Before the band heads out on tour, they'll attend the 60th Annual Grammy Awards on Sunday (Jan. 28). Zac Brown Band are nominated for Best Country Duo / Group Performance for "My Old Man" at the 2018 Grammy Awards. The awards air on Sunday at 7:30 PM ET on CBS.

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