Duggar pals Alyssa and John Webster, of the new UP TV show Bringing Up Bates, are expecting their first child in April 2015 Credit: Courtesy of Britton Felber/Photography by Britton

Another baby for the Bates family! Just weeks after the arrival of the first Bates grandchild comes news of a second — from recently wed stars Alyssa and John Webster, of the upcoming UP TV series Bringing Up Bates.

Alyssa, 20 — who married Florida Congressman Daniel Webster's son John, 25, six months ago on May 24 in Knoxville, Tenn. — is pregnant and expecting her first child, she and her husband confirm exclusively to Us Weekly. They'll welcome their little one in April 2015.

"We are overwhelmed with excitement to expecting," the lovebirds gush of their happy news. "We can't wait to welcome our precious little baby into the world. Our child is going to be spoiled with so many aunts and uncles."

Indeed, Alyssa is one of 19 children born to Gil and Kelly Jo Bates, who are friends with the Duggars and have appeared on the show 19 Kids and Counting, as well as on their own short-lived TLC series United Bates of America. Of the 19 Bates kids, only eldest son Zach Bates and his wife Whitney have any little ones of their own; as Us exclusively reported last month, they welcomed baby boy Bradley Gilvin on Oct. 29.

"We are thrilled to learn that we have another grand-baby on the way!!" Gil, 49, and Kelly Jo, 47, say of Alyssa's pregnancy. "Our cup is overflowing with blessings! We can hardly wait to welcome this little one into the world."

The Bates brood — which also includes Michaella, Erin, Lawson, Nathan, Tori, Trace, Carlin, Josie, Katie, Jackson, Warden, Isaiah, Addallee, Ellie, Callie, Judson, and Jeb — will make their return to reality TV on Jan. 1, when Bringing Up Bates premieres on UP TV at 9 p.m.