This will be Jill's second child as she welcomed Israel in April 2015 with her husband Derick Dillard.
The family just returned to the U.S. after completing Christian mission work in Central America.
The 26-year-old posed next to her mother, Michelle, who captioned the snap, "I'm so excited to have this sweet momma back in Arkansas."
She also shared another pic, which was a selfie of her and her husband arriving to church. She captioned the pic, "So grateful to be back in the States and get to go to our church this morning @crosschurch
Check out the pics below:
However, upon their return, Jill revealed a friend was tragically kidnapped and murdered while she was on the mission. She took to the family's website dillardfamily.com and wrote that her friend's body was discovered by a river.
"We received a phone call on Monday from a friend here in Central America informing us that one of our other good friends (a fellow Christian) had been murdered the day before and that his family had found his body down by the river earlier that morning,' the young mother announced," she wrote on her family blog.
She continued, "Even though we had spoke with our friend and his family about the realities of the dangers here, and especially in their area right now, we were shocked when we learned of his kidnap and murder."
She also spoke about her friend's funeral and asked for prayers to the victims family.
"Please pray for our friend's wife, son, daughter, granddaughter and other relatives," she said. "Please also pray for God to allow the local church and us to reach out to their family and be able to love on and comfort them during this difficult time."