Marcus Anthony becomes the third GranDuggar.

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The third GranDuggar has arrived.

Josh and Anna Duggar welcomed Marcus Anthony last Sunday morning, reports People. The reality stars say big sister Mackynzie, 3½, and brother Michael, 2, are "thrilled to welcome a (not so) little brother," who weighed in at 9 lbs., 3 oz.

"We are so thankful that mom and baby are well! We are blessed to have our family close as we celebrate this gift from God," Mom and Dad tell the magazine.

Fans, of course, can learn more this Sunday, when 19 Kids & Counting: GrandDuggar Makes 3! premieres.

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