September 08, 2014 03:00 PM

Rick Diamond/Getty

The newest Baby A has arrived!

Dave Haywood and wife Kelli Cashiola Haywood welcomed their first child on Sunday, Sept. 7 in Nashville, PEOPLE confirms.

“So happy to have a healthy baby boy here with us! Cash Van Haywood was born last night,” the Lady Antebellum guitarist, 32, announced via the band’s Twitter account.

“Mom and Dad are doing great and couldn’t be happier!”

The baby boy weighed in at 7 lbs. and measures 19 inches long. “Cash is taken from Kelli’s maiden name Cashiola and Van is Dave’s father’s name,” the band’s rep shares.

The guitarist admitted he and his record exec wife of two years have been in full-on prep mode leading up to the birth — even practicing diapering skills on bandmate Hillary Scott‘s 13-month-old, Eisele Kaye.

“We’ve been trying to read and prepare and talk and think through every scenario for the delivery and the labor and how we want to try to be as parents,” Haywood told PEOPLE last month. “We know when the moment happens, all hell is going to break loose.”

The happy arrival came a little earlier than expected, causing the group to cancel their show Sunday evening at Allegan County Fair in Michigan. Haywood now has a few weeks to get to know his new son as the trio takes a break before their next show in the Dominican Republic on Sept. 28 — and before launching their new album, 747, two days later.

So happy to have a healthy baby boy here with us! Cash Van Haywood was born last night, Mom & Dad are doing great and couldn’t be happier!

— Lady Antebellum (@ladyantebellum) September 8, 2014

— Eileen Finan with reporting by Cynthia Sanz

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