Carrie Underwood and husband Mike Fisher are expecting their first child together!

The American Idol alum posted a photo of herself holding her two dogs wearing Im going to be a big sister and big brother shirts and wrote, "In honor of Labor Day, Ace & Penny would like to make an announcement. Their parents couldn't be happier."

Fisher added on Twitter, "We haven't picked names yet but it's looking like Fly is gonna fly. #boyorgirl #flyfisher."

This will be the first child for Underwood, 31, and Fisher, 34, who tied the knot back in 2010. A source tells Us Weekly, They couldnt be happier to be starting a family."