"There is a lot of joy," Jill's mom, Michelle Duggar, gushed to People.
"Jill has been such a wonderful sister to all of her brothers and sisters," her dad, Jim Bob Duggar, added. "She always makes activities for the kids, looks for ways to make a dull project fun. And Derick is going to be a great father."
Although Jill and Derick only announced they are expecting their first child this week, Jill has been battling bouts of morning sickness for some time now.
"I have said to Jill, 'When you feel sick and so tired, remember you are growing another person inside of you and this is a good reason to be sick,'" Michelle dished. "For me, I would try to sit down and rest whenever I was sick while pregnant. You have to do what you have to do. The end result is so worth it."
Meanwhile, Derick's mother, Cathy Dillard, says she's "really looking forward to helping them get ready for the baby!"
"I am up for babysitting if they need help," Jill's younger brother Jedidiah said. "I am so excited for Jill and Derick and I know they are going to make wonderful parents. Jill has always wanted to be a mom. She is perfect for it. Derick is a wonderful guy, he will be a good dad. He will be amazing."
Jill and Derick's baby news comes just two months after the couple married in a ceremony in Springdale Arkansas surrounded by family.