"Little People, Big World" fans have been waiting for a Roloff family reunion. On Monday, it finally happened as Matt and Amy Roloff got together with all their four children: Zach and Jeremy, 28, Molly, 24, and Jacob, 21. This united gathering was so they could receive an award from the Guinness Book of World Records.

Among the Roloff siblings, only twins Zach and Jeremy still appear on "Little People, Big World." Their shy and private sister Molly begged off from the long-running reality show when she left home to enter college. She's now married and lives in Spokane, Washington. Their youngest brother, Jacob, also quit the show upon turning 18.

He has been very vocal about his frustrations with reality television and slammed TLC for supposedly faking some scenes.

Roloff family makes history

Despite their past misunderstandings, the Roloffs are closer than ever. And on Monday afternoon, the whole clan got together and posed for a rare family picture.

They marked a momentous occasion as Matt Roloff announced on social media that their family has just "made history." They were given a Guinness Book of World Records award for “The Most Episodes of a Family-Focused Reality Television Show,” People reported.

In the family photo, the Roloff family members were all smiles as they proudly held onto their Guinness Book of World Records plaque. According to Matt, his daughter Molly came home just for this amazing surprise. And even Jacob happily joined his famous family as they celebrated.

'LPBW' has 13 seasons, 307 episodes

Matt also posted another photo of just him and Amy Roloff. The picture made a lot of fans on Instagram emotional, as they remembered Matt and Amy's early days on "Little People, Big World." The two started the show back in 2006 as a happy couple raising their young kids in their pumpkin patch [VIDEO] in Oregon. In 2015, Matt and Amy announced their shocking separation and finalized their divorce in 2016. The ex-couple still live at the Roloff Farms and manage their property as business partners.

Despite Matt and Amy's divorce, the Roloff family is growing and the show is still going strong. Twelve years since the show's humble premiere, "Little People, Big World" has aired 307 episodes, In Touch Weekly reported.

Zach and Jeremy are now married and welcomed their first babies last year, Jackson and Ember [VIDEO]. Zach's son Jackson was born with achondroplasia, the same kind of dwarfism that Zach and his mom Amy have. Molly got married last year as well, and Jacob recently announced his engagement to long-time girlfriend Izzy Rock.

"Little People, Big World" is currently in its 13th season on TLC and continues to rate well.