Underwood shares the big news in an Instagram video, saying her little family is "absolutely over the moon."
Carrie Underwood snuck a major surprise into her tour announcement on Wednesday: she's pregnant!
While sharing details about her upcoming Cry Pretty Tour in an Instagram video, she broke the news that she and husband Mike Fisher are expecting their second child together, while explaining why the tour doesn't begin until May 2019.
"Mike, Isaiah and I are absolutely over the moon and excited to be adding another little fish to our pond," she said, as the camera panned out to show the word "Baby" spelled in balloons above her.
"This has just been a dream come true with the album and baby news," she continued. "We're just so excited and glad you guys can share this with us and be a part of it with us. Love you guys, we'll see you on the road in 2019."
She ended the cute video with an awkward, "Yeah, have a great day!"
The two are already parents to 3-year-old son Isaiah.