Brandon Blackstock and Kelly Clarkson

Kelly Clarkson and her husband Brandon Blackstock welcomed their first child.

"Our baby girl River Rose Blackstock arrived on June 12th!" Clarkson tweeted on Saturday. "Thank you everyone for all of your well wishes! Brandon and I are on cloud 9!! :)"

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The American Idol alum married the talent manager in Oct. 2013, one month before the newlyweds announced they were expecting.

Blackstock, whose stepmom is Reba McEntire, is already father to Savannah, 11, and Seth, 7, from a previous marriage.

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