The Hansons are building an mini army!

The youngest brother of the pop trio, Zac Hanson, and his wife Kate are expecting their third child together, due this fall.

"We are so happy and thankful to add more life and love to our family!," the singer tells People.

The twosome's kids, Shepard, 5, and Junia Rose Ruth, 2, are just as excited as their proud parents. "It's a fun time to watch the little ones so excitedly anticipating their new sibling," the 27-year-old explains.

Now with baby number three on the way for the youngest Hanson brother, the boys' will have 10 children between just the three of them! For the record, Taylor Hanson has five and Isaac has two. 

They're definitely keeping the Hanson legacy alive. Click "Launch Gallery" above to see more teen idols now and then!

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