The Duggars are back! TLC is set to premiere the full Season 2 return of its three-part special "Jill and Jessa: Counting On," the network announced on its website. The series, which documents the lives of the adult Duggar children in the wake of scandals surrounding eldest brother Josh, with daughters Jill Dillard (nee Duggar) and Jessa Seewald (nee Duggar) as the show's stars.

"2015 was a very difficult year," Jessa, 23, says in a first look for the upcoming season.

"Through all our family's gone through," Joy Anna, 18, says with tears in her eyes, "I've grown up a lot."

Season 2 will document the Duggar children as they navigate through life and celebrate milestones, according to TLC. Fans can expect to see more of Jill and her husband Derick Dillard's missionary trip to South America with their infant son Israel, while Jess and her husband Ben Seewald ease into their role as first-time parents to baby Spurgeon and also move towards their goal of adopting a second child.

The new full season will also feature sisters Jana, 26; Jinger, 22; and Joy Anna; along and brothers John David, 26; Joseph, 21; and Josiah, 19, as they each face their own realities of growing up and supporting each other as they adjust to adulthood.

"We really were able to draw closer together. We've shared this journey with the world," Jessa says in her on-camera interview, sporting a new hairstyle of side-swept bangs. "Family is everything."

Watch the full promo below and be sure to catch the season two premiere of "Jill and Jessa: Counting On," which is set to air on March 15 at 9 p.m. on TLC.