@jessaseewald / Instagram 1 / 5
@jessaseewald / Instagram 1 / 5

The Duggars are expanding their family yet again.

Jessa (Duggar) Seewald and her husband Ben Seewald confirmed on Tuesday that they are expecting their second child. "We both kind of feel at this point that it's a boy but we haven't had an ultrasound to find yet," Jessa announced. "I think, probably, I won't be able to wait until baby is born to know the gender. We haven't decided yet if we're going to share that news with everybody or keep it a secret again."

Jessa, 23, and Ben, 21, welcomed their son Spurgeon last November, right around the time of their one-year wedding anniversary. "I think Spurgeon will be a great big brother," Ben gushed. "He'll learn a lot of valuable lessons having a little sibling. Yeah, we're really excited about that."

WATCH: Jana Duggar Gets Candid About What She's Looking For in a Potential Suitor

Ben admits that they "really have no idea" what they'll name their baby-to-be, and are open to "suggestions."

In a recent promo for TLC's "Counting On," the couple revealed that they were looking to adopt but also hinted that new things were on the horizon for their family. "Ben and I have had it on our hearts to adopt. That was something we talked about even before we were even married," Jessa admits. "We don't know exactly what we're getting into, but we're excited to start the journey."

Meanwhile, Jessa's sister Jill (Duggar) Dillard and her husband Derick Dillard have also expressed that they too are trying for baby number two. "We are trying to have another child," Jill shares in another "Counting On" promo.

Derick adds, "I think we'll have another kid by next year."

WATCH: Jinger Duggar's Fiance Jeremy Vuolo Goes Ring Shopping on Counting On, Family Talks About Their 'Fast' Courtship

"Counting On" premieres Tuesday on TLC, and the season will also follow the engagement story of Jinger Duggar and soccer player Jeremy Vuolo.