Jessa Duggar just welcomed her son on Monday, and now she's sharing him with the world.

Duggar, 24, posted the first photo of her second child with husband Ben Seewald on Instagram late Monday night.

"#BabySeewald2 is here and we couldn't be more in love!" Duggar captioned the adorable picture in which the newborn is wearing a blue onesie with a puppy on it.

The Counting On stars have yet to reveal the baby's name. He was born weighing eight pounds and 11 ounces and joined the couple's 15-month-old son Spurgeon Elliot.

"We are so thankful to God for this precious new gift of life and are excited to be a family of four! Thanks to everyone for your prayers and well wishes!" Duggar and Seewald told People after the baby arrived.

The pair concluded, "2017 is shaping up to be a wonderful year already, and we know Spurgeon will do a great job in his new role. Having Spurgeon has been such a wonderful blessing, and we cannot wait to see the face of this sweet new baby (or babies!)."

Duggar and Seewald announced in late August 2016 they were expecting Baby No. 2, and then Duggar documented her pregnancy on social media with frequent baby-bump updates and more.

Spurgeon was born on November 5, 2015, just about one year after the pair got married.