"We are so excited to announce that we are expecting a new little one! As we watch our children grow and thrive — we look forward to baby six joining us this fall! #littleduggars," Anna, 30, wrote alongside a video that features their children laying out letters that spell out, "New baby coming this fall."
"Mommy is having a baby," Anna can be heard telling her youngsters as they scream in excitement. The couple—who tied the knot on Sept. 26, 2008 -- is already parents to five children: Mackynzie, 9, Michael, 7, Marcus, 5, Meredith, 3, and 19-month-old Mason.
Josh's parents, Jim Bob and Michelle Duggar, also shared a heartfelt message on their website, congratulating the pair.
"We are so happy for Josh and Anna, expecting their 6th child and our 16th grandchild! Each child is a blessing from God! Anna is one of the most amazing women in the world, she is a Proverbs 31 woman!" the statement began. "Anna & Josh are good parents and it is going to be neat to see what God does with each one of their children’s lives. Mackenzie, Michael, Marcus, Meredith and Mason are so excited to have a little sibling on the way! God is at work in their sweet little family! He has blessed them with another child! What a gift! The best days for their family are still ahead!"