Thompson Square's Shawna & husband Keifer Thompson welcome their first child -- find out his unique name!

Before you go, we thought you'd like these...
Before you go close icon

19 PHOTOS
Thompson Square
See Gallery
Thompson Square's Shawna & husband Keifer Thompson welcome their first child -- find out his unique name!
NASHVILLE, TN - NOVEMBER 04: Shawna and Keifer Thompson of Thompson Square attend the 49th annual CMA Awards at the Bridgestone Arena on November 4, 2015 in Nashville, Tennessee. (Photo by Taylor Hill/Getty Images)
NASHVILLE, TN - NOVEMBER 04: Singer Shawna Thompson of Thompson Square attends the 49th annual CMA Awards at the Bridgestone Arena on November 4, 2015 in Nashville, Tennessee. (Photo by Jon Kopaloff/FilmMagic)
NASHVILLE, TN - NOVEMBER 04: Shawna Thompson and Keifer Thompson of Thompson Square attend the 49th annual CMA Awards at the Bridgestone Arena on November 4, 2015 in Nashville, Tennessee. (Photo by Taylor Hill/Getty Images)
NASHVILLE, TN - JUNE 11: Musicians Shawna Thompson (L) and Keifer Thompson (R) of Thompson Square perform at the HGTV Lodge during CMA Music Fest on June 11, 2015 in Nashville, Tennessee (Photo by Jason Davis/Getty Images for HGTV)
NASHVILLE, TN - JUNE 11: Musician Shawna Thompson of Thompson Square performs at the HGTV Lodge during CMA Music Fest on June 11, 2015 in Nashville, Tennessee (Photo by Jason Davis/Getty Images for HGTV)
NASHVILLE, TN - JUNE 10: Shawna Thompson and Keifer Thompson of Thompson Square attends the 2015 CMT Music awards at the Bridgestone Arena on June 10, 2015 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for CMT)
NASHVILLE, TN - JUNE 08: Recording Artist Keifer Thompson of Thompson Square performs during the Thompson Square Superfan Concert at SiriusXM Music Theater at the Bridgestone Arena on June 8, 2015 in Nashville, Tennessee. (Photo by Jason Davis/Getty Images)
NASHVILLE, TN - JUNE 08: Recording Artists Shawna and Keifer Thompson of Thompson Square perform during the Thompson Square Superfan Concert at SiriusXM Music Theater at the Bridgestone Arena on June 8, 2015 in Nashville, Tennessee. (Photo by Jason Davis/Getty Images)
NASHVILLE, TN - JUNE 05: Keifer Thompson and Shawna Thompson of Thompson Square perform onstage during Pandora Country at Marathon Music Works on June 5, 2015 in Nashville, Tennessee. (Photo by Jason Davis/Getty Images for Pandora Media Inc.)
NASHVILLE, TN - JUNE 08: Recording Artists Shawna and Keifer Thompson of Thompson Square perform during the Thompson Square Superfan Concert at SiriusXM Music Theater at the Bridgestone Arena on June 8, 2015 in Nashville, Tennessee. (Photo by Jason Davis/Getty Images)
NASHVILLE, TN - JUNE 05: Shawna Thompson and Keifer Thompson of Thompson Square perform onstage during Pandora Country at Marathon Music Works on June 5, 2015 in Nashville, Tennessee. (Photo by Jason Davis/Getty Images for Pandora Media Inc.)
NASHVILLE, TN - JUNE 05: Shawna Thompson and Keifer Thompson of Thompson Square perform onstage during Pandora Country at Marathon Music Works on June 5, 2015 in Nashville, Tennessee. (Photo by Jason Davis/Getty Images for Pandora Media Inc.)
NASHVILLE, TN - APRIL 23: Singer-songwriter duo Shawna Thompson and husband Keifer Thompson of Thompson Square perform live on the Morning Show with Storme Warren on SiriusXM's The Highway channel on April 23, 2015 in Nashville, Tennessee. (Photo by Terry Wyatt/Getty Images)
NASHVILLE, TN - APRIL 23: Singer-songwriter duo Shawna Thompson and husband Keifer Thompson of Thompson Square perform live on the Morning Show with Storme Warren on SiriusXM's The Highway channel on April 23, 2015 in Nashville, Tennessee. (Photo by Terry Wyatt/Getty Images)
FORT WORTH, TX - APRIL 18: Recording artists Shawna Thompson (L) and Keifer Thompson of music group Thompson Square perform onstage during the ACM Charity Motorcycle Ride & Concert from Strokers Dallas to Maverick Harley Davidson during the 50th Academy of Country Music Awards on April 18, 2015 in Fort Worth, Texas. (Photo by Jason Merritt/ACM2015/Getty Images for dcp)
FORT WORTH, TX - APRIL 18: Recording artists Shawna Thompson (L) and Keifer Thompson of music group Thompson Square perform onstage during the ACM Charity Motorcycle Ride & Concert from Strokers Dallas to Maverick Harley Davidson during the 50th Academy of Country Music Awards on April 18, 2015 in Fort Worth, Texas. (Photo by Jason Merritt/ACM2015/Getty Images for dcp)
WEST PALM BEACH, FL - MARCH 07: Shawna Thompson of the duo Thompson Square performs onstage during WIRK Rib Round Up concert at Cruzan Amphitheatre on March 7, 2015 in West Palm Beach, Florida. (Photo by Sara Kauss/Getty Images)
WEST PALM BEACH, FL - MARCH 07: Shawna Thompson and Keifer Thompson of the duo Thompson Square perform onstage during WIRK Rib Round Up concert at Cruzan Amphitheatre on March 7, 2015 in West Palm Beach, Florida. (Photo by Sara Kauss/Getty Images)
of
SEE ALL
BACK TO SLIDE
SHOW CAPTION +
HIDE CAPTION

The country singer duo, Thompson Square, has officially become a trio!

Keifer and Shawna Thompson welcomed their first child, a son, on Sunday, their rep confirms to ET.

WATCH: Louis Tomlinson Tweets About His Newborn Son

Their brown-haired, blue-eyed baby was born at the wee morning hour of 2:46 a.m. CT in the Nashville, Tennessee-area. They've named their bundle of joy Rigney Cooper, with Rigney being Shawn's grandmother's maiden name.

"We're so excited to be able to share this monumental day with all of you," Thompson Square told ET in a statement. "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."

How cute is it that the Thompsons' little man already has all those nicknames?!

Just two weeks ago, Shawna, 37, shared a photo on Twitter of her growing baby bump.

"38 weeks and two days as of today! Little Cooper will be here before we know it," she captioned the pic.

PHOTOS: Holly Madison Is Expecting Baby No. 2

The "Are You Gonna Kiss Me or Not" singers wed in 1999 and will celebrate their 17th wedding anniversary in May. They announced they were expecting their first child in August with an adorable Instagram photo that showed the pair drinking out of Coke cans labeled "Dad" and "Mom," then revealed the baby's gender one month later.

WELL……WE HAVE DECIDED NOT TO BE A DUO ANYMORE!!!!!!! #Jan2016 #T3 #WeDidIt #BabyOnBoard

A photo posted by thompson square (@thompsonsquare) on



Another singer welcomed a son this week. Michael Buble's wife gave birth to their second son, Elias, on Jan. 22. Get all the details on the GRAMMY winner's growing brood in the the video below.

Michael Buble and Wife Lusiana Lopilato Welcome Baby No. 2 -- A Boy!

Read Full Story

From Our Partners