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Shawna Thompson, Keifer Thompson, Thompson Square, 2015 CMA Awards

Michael Loccisano/Getty Images

Thompson Square is no longer a duo.

The country music couple, made up of husband and wife Keifer Thompson and Shawna Thompson, have welcomed their first child together, E! News has learned exclusively.

Shawna, 37, gave birth to a baby boy named Rigney Cooper Thompson at 3:46 a.m. ET on Sunday, E! News has learned exclusively. Her and Keifer's son weighs 7 pounds and 13 ounces and has dark blue eyes and brown hair.

""God blessed us this morning with a little 7 pound 13 oz miracle," the couple said in a statement to E! News. "It's hard to explain this kind of love. We're so overjoyed. He's already got us wrapped around his little finger."

Rigney Cooper Thompson, Thompson Square, Keifer Thompson, Shawna Thompson

Thompson Square

The name "Rigney" is Shawna's grandmother's maiden name.

"We're so excited to be able share this monumental day with all of you," Shawna and Keifer, 39, later said on Instagram, alongside a photo of the three. "We've had many wonderful things happen to us but this absolutely tops them all. We want to thank you all for being there for us and our music and for all of your support during our pregnancy."

"We can't wait to see you out on the road this year but until then please say hello and welcome to this big ol world, Rigney Cooper Thompson aka ‪#‎coopert‬ ‪#‎cooperman‬ ‪#‎coopdeville‬ ‪#‎coopdog‬ ‪#‎sircoopsalot‬," they added.

Thompson Square, Instagram

Instagram

The Thompson Square duo, known for hits such as "Are You Gonna Kiss Me or Not," "If I Didn't Have You" and "Trans Am," wed in May 1999. They announced Shawna's pregnancy and the sex of their child in September on social media. She has since showcased her baby bump there several times, including at the 2015 CMA Awards in Nashville in November.

Shawna and Keifer had also recently hinted on social media they planned to name their son Cooper.

IT'S A ...........

BOY OR GIRL???? HERE'S YOUR ANSWER.

Posted by Thompson Square on Tuesday, September 15, 2015