Dr. Jennifer Arnold, 39, and husband Bill Klein, 38, of TLC's The Little Couple, were thrilled on Monday when their 2-year-old daughter Zoey joined them in India.
"We are thrilled to announce that we've picked up our beautiful daughter, Zoey, from India today," the couple tell PEOPLE in an exclusive statement. "Our hearts have grown in the past six months as new parents to William, and we are excited and overjoyed to welcome Zoey to our family and watch Will becoming a loving big brother."
After years of struggling with fertility issues, the couple rejoiced when their son Will came home from an orphanage in China. Zoey's adoption was an up-and-down process for the new family, as months went by and they weren't sure whether or not the adoption would go through.
The new family of four will travel back to their home in Houston in the next few weeks and are looking forward to their two children getting to know one another and the family bonding. Zoey has a form of dwarfism like her new family members.
More of their journey to parenthood (again) can been seen in the season finale of their show, airing Tuesday at 10 p.m. EST.
Below, see an exclusive sneak peek at the finale episode.