Congratulations to Carrie Underwood, who has announced today, Sept. 1, that she is officially pregnant!

Underwood announced via an Instagram post that she is expecting her first child with husband, NHL player Mike Fisher.

"In honor of 'Labor' Day, Ace & Penny would like to make an announcement," she wrote in the caption of the photo of her two dogs. "Their parents couldn't be happier..."

The photo features both Ace and Penny wearing "I'm going to be a big brother" and "I'm going to be a big sister" shirts.

Rumors of Underwood's pregnancy began around the middle of the summer, but the 31-year-old country star and former 'American Idol' winner kept quiet about her upcoming bundle of joy until now.

Underwood and Fisher began dating in 2008 and later became engaged in 2009. The two were then married on July 10, 2010 in Georgia.

Congratulations to Carrie and Mike! We can't wait to see photos of the little boy or girl!

More From PopCrush