Little People, Big World's divorced parents Matt and Amy Roloff have put aside their differences amid some joyful news: They're grandparents!

The former couple's son Zach, 26, and his wife Tori welcomed their first child, a son named Jackson Kyle Roloff, on May 12.

The big boy weighed a whopping 9 pounds, 1 ounce, and measured 20.5 inches long.

The proud new dad announced the news on Instagram last night.