Jill Duggar and Derick Dillard recently spoke on their second pregnancy, and how Israel will be a "fantastic big brother."

Duggar and Dillard are expecting baby no. 2, as they confirmed Tuesday to various media outlets. The 19 Kids & Counting stars have now revealed how they learned they were pregnant and much more.

"We were really excited when we found out we were expecting," Duggar says in a new TLC video. "I had been through tons of pregnancy tests, one of those big online value pack things. I had been going through pregnancy tests, so whenever I got positive pregnancy tests - I took like three - I was like, 'Ah, really?'"

As for their 20-month-old son Israel's feelings on becoming a big brother, Duggar says, "Israel's going to be a great big brother. He already loves other little babies. The only thing I think he'll have to work on is just learning that babies that are smaller than you, you have to be more gentle with."

"Israel's going to be a fantastic big brother," adds Dillard.

Jill's parents, Jim Bob and Michelle Duggar, also speak in the video about their own excitement in becoming grandparents again.

"We're so excited for you guys. And y'all are great parents," Jim Bob says. "You guys are being fruitful and multiplying. When you have one, it changes your life and when you have two, it's just a little bit more. Then you have three."

Jim Bob concludes, "We're happy for you,. God bless you. I can't believe our babies are having babies."

Jill is the fourth child of Jim Bob and Michelle, who have 19 children in all. They have six grandchildren, with Duggar and Dillard's child on the way in addition to Jessa Duggar and Ben Seewald's second child.