Carrie Underwood has joined the soon-to-be mommy club! The 31-year-old announced yesterday (September 1st) that she and her husband Mike Fisher are expecting a baby!

To help break the news, Carrie used her two fur babies: "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.

Carrie added, "Their parents couldn't be happier..."

Carrie and Mike are already discussing possible names. After letting his wife make the announcement, Mike joked on Twitter: We haven't picked names yet but it's looking like Fly is gonna fly. #boyorgirl #flyfisher."

Carrie is due in Spring 2015. She'll return to host the CMA Awards with Brad Paisley this November.

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