Carrie Underwood is pregnant! The 31-year-old superstar and husband Mike Fisher announced Monday (Sept. 1) they are expecting a baby, with an assist from their two fur kids.

It will the first (human) child for Underwood and her husband of four years. "In honor of "Labor" Day, Ace & Penny would like to make an announcement," she wrote on social media, sharing a photo of Ace and Penny in Big Brother and Big Sister shirts.

Adds Underwood, "Their parents couldn't be happier..."

The 'Blown Away' singer has always left the door open for children, but never spoke with much urgency about starting a family after marrying in 2010 However, it seems she and Fisher are already discussing possible names. After letting his wife make the announcement, the Predators player shared (joked?) on Twitter: We haven't picked names yet but it's looking like Fly is gonna fly. #boyorgirl #flyfisher."

Underwood is due in Spring 2015. She will return to host the CMA Awards with Brad Paisley this November.

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