The Duggars Welcome Grandchild No. 1!

Michelle and Jim Bob are grandparents as their eldest, Josh, and wife Anna give birth to Mackynzie Renee Duggar on Thursday

By Breanne L. Heldman Oct 09, 2009 4:15 PMTags

Even with 18 (almost 19) children, there's a first for everything.

For Michelle and Jim Bob Duggar, stars of TLC's 18 Kids and Counting, last night was an especially important milestone—the birth of their first grandchild.

The family's eldest son, Josh Duggar, and his wife, Anna, welcomed baby Mackynzie Renee Duggar in their home with a midwife and a doula. She weighed a solid 8 pounds and was 19.5 inches long, Meredith Vieira announced on the Today show this morning.

Little Mackynzie won't be the youngest Duggar for long—she'll get her 18th aunt or uncle in just a few months.

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Keep up with all the celebrity babies right here.