Jill Duggar and husband Derick Dillard have announced they are expecting their second child together.

The Counting On stars posted a TLC video as well as a sweet message for fans Tuesday on their own website, revealing another baby is on the way.

The couple's son, Israel, 20 months, held up a sign at the start of the video that read, "I'm being promoted to big brother."

"We're expecting!" Derick said as he was sitting on a couch next to his wife of two years.

"We were really excited when we found out we're expecting. I had been through tons of pregnancy tests," Jill, 25, revealed.

"She bought a big bag online. We wanted to be 100% [sure]," Derick noted.

"Israel is going to be a great big brother," Jill explained. "He already loves other little babies. The only thing I think he'll have to work at is learning that babies are smaller than you, so you have to be more gentle with them."

"Israel is going to be a fantastic big brother," Derick added.

"We've already told him that the baby is right here [in mom's belly]. So it might throw him off in his vocabulary because he thought that was 'stomach' before and now we point and say, 'Baby.' But he gets it and he'll be really, really excited to be a big brother, I'm sure, and we just look forward to growing as a family."

The Dillard family captioned the TLC video clip: "Words can not describe how excited we all are that God has blessed us with another precious gift! We are eager for another sweet Dillard baby to join our lives, and we know Israel will be a great big brother. Don't forget to check back here often for updates on our family and our ministry and remember to tune in Counting On on TLC as this pregnancy unfolds! We are so excited!!! Love, the Dillards (party of 4!)"

The baby's due date is in July 2017, according to People.

Ironically, Jill's younger sister Jessa Duggar and husband Ben Seewald announced this past August they are expecting their second child as well, a sibling for their 13-month-old son Spurgeon.

Jill and Derick began dating in November 2013 and got engaged in April 2014. They tied the knot in June 2014 and welcomed Israel in April 2015.
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Counting On will be moving to Monday nights beginning January 16 at 9PM ET/PT on TLC.