If you haven't heard the news by now, Carrie Underwood is expecting her second child with husband Mike Fisher. The superstar hasn't revealed her due date, but she does have a visible baby bump, as she showed off in a social media post on Friday night (Aug. 10).

Underwood posted from the Grand Ole Opry, showing herself on the side of the stage with, yes, an obvious belly bulge, which is something the fitness-buff superstar (who's known for her intense workouts, as well as her own activewear line) would not normally be sporting.

Given the timing of her pregnancy announcement — a common benchmark to pass is the three-month mark — it's a fair guess that she's probably due around late January or very early February 2019.

Underwood was scheduled to play along with the Oak Ridge Boys, Runaway June, Mountain Heart, Ricky Skaggs, Bill Anderson, Jeannie Seely, Mark Wills and others Friday evening.

Underwood revealed the news of her second pregnancy in a video online on Aug. 8. She first announced the dates for her upcoming 2019 Cry Pretty Tour 360, which launches in May of 2019, then made the big announcement as the camera pulled back to reveal she was sitting under a balloon that spelled out "Baby." She and husband Fisher welcomed their son, Isaiah, in February 2015.

"Mike and Isaiah and I are absolutely over the moon and excited to be adding another little fish to our pond!" she told fans. "This has just been a dream come true, with album and with baby news and all that stuff. We're just so excited, and just so glad that you guys can share in this with us."

Underwood has not revealed the sex of her baby, but given the fact that she made the announcement while wearing a pink jacket while sitting in a roomful of pink, many fans are speculating she is having a girl this time around.

Watch Carrie Underwood Talk About Cry Pretty the Album

Relive Carrie Underwood's Best Baby Bump Pictures: