Credit: TLC/Scott Enlow Photo: Josh and Anna Duggar

Jim Bob and Michelle Duggar of TLC's 19 Kids and Counting are going to be grandparents again. Their oldest child, Josh, 25, and his wife Anna, 24, told People they are expecting their third child.

They already have a daughter, Mackynzie, 3, and son, Michael, 21 months. According to People, Anna had taken a pregnancy test when the family visited Asia for 19 Kids and Counting: Duggars Do Asia but it was negative. "I thought for sure I was pregnant and so I was a little disappointed," Anna said. "But two weeks later, I found out I was pregnant."

"It is very exciting," Josh told People. "It's fun for Michael and Mackynzie being so close in age and this baby will be, too. We feel very blessed and happy."

The TLC show following the Duggar family started in 2008 as 17 Kids and Counting. In December 2011, Michelle and Jim Bob revealed that she miscarried their 20th child and held a memorial service for their unborn daughter.

19 Kids and Counting: Duggars Do Asia premieres Tuesday at 9 p.m. on TLC.

Source: People