Jill Duggar and husband Derick Dillard have another baby on the way.

The 25-year-old reality star announced in a blog post Tuesday that she's pregnant and expecting her second child with Dillard, 27. The couple are already parents to 20-month-old son Israel.

"Words can not describe how excited we all are that God has blessed us with another precious gift!" Duggar wrote. "We are eager for another sweet Dillard baby to join our lives, and we know Israel will be a great big brother."

The former 19 Kids & Counting star revealed in an interview with People that baby No. 2 is due in July. She and Dillard told the magazine they are "so excited" to be adding another member to their family.

"Children really are a wonderful blessing from God. Having Israel has been such a delight to us that we know a second sweet baby will only continue to add joy to our family. We are thankful to God for this sweet child and we cannot wait to see her or him face to face!" the pair said.

Duggar and Dillard married in Springdale, Ark., in 2014, and welcomed Israel the next year. The reality star had told ABC News after her wedding that both she and Dillard "want as many kids as God will give us."

"We've talked about adoption," she revealed. "My parents have kept popping them out so we'll see how [our] fertility is!"

Duggar and her family came to fame on the TLC series 19 Kids & Counting, which was canceled in 2015 in the wake of Josh Duggar's sex abuse scandal. She and several of her siblings, including Jessa Duggar, now star on Jill & Jessa: Counting On.