And baby makes five!

Isaac Hanson, the oldest brother in the band Hanson, welcomed daughter Nina Odette with his wife, Nikki, on March 11.

Nina is the third child, and first daughter to the pair, who have had sons Clarke Everett, who turns 7 next month, and James Monroe, 5.

"After more than five years of not having a baby in the house, having our first little girl is going to be fun," Hanson told People. "I know that Everett and Monroe are excited about being big brothers.”

Baby Nina, who weighed in at 7 lbs. 15 oz., and was born in the musician's hometown, Tulsa, Okla., is joining a big brood of cousins. Middle brother Taylor, 31, and wife Natalie have five children of their own: Ezra, 11, Penelope, 8, River, 7, Viggo, 5, and Wilhelmina, 1. Youngest brother Zac, 28, and wife Kate have three of their own: Shepherd, 5, Junia, 3 and Abraham, 5 months.

According to the New York Daily News, the band of brothers is preparing for a world tour to support their sixth studio album, Anthem, which was released this past June.

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