Carrie Underwood, Mike Fisher expecting baby No. 2

Carrie Underwood is "over the moon."

The country superstar announced she and husband Mike Fisher are expecting another bundle of joy.

The "Cry Pretty" singer announced the exciting news on Instagram Wednesday.

"Mike and Isaiah and I are absolutely over the moon and excited to be adding another little fish to our pond!" a joyous Underwood shared. "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."

The baby news comes at the same time that Underwood, 35, announced she will be embarking on the "Cry Pretty Tour 360" in May 2019.

Underwood and Fisher are already parents to son Isaiah, 3. The couple celebrated eight years of marriage last month.

The singer recently opened up about missing her chance to have a big family with Fisher.

"I’m 35, so we may have missed our chance to have a big family," Underwood told Redbook magazine. "We always talk about adoption and about doing it when our child or children are a little older."

She also opened up about having "a few more downs than ups last year" after a scary fall left her with a broken wrist and 50 stitches in her face.

"A lot happened in 2017 during my 'off year,'" Underwood told the latest issue of the mag. "I love it when people say, 'You took a year off.' I’m like, 'You know, I had this shoot and this thing, and I was writing this and doing that.' There was always so much to do, but it was also a very soul-searching year for me."