Carrie Underwood welcomes her new baby boy, Jacob

Carrie Underwood has a lot to celebrate -- she just welcomed a healthy new baby boy!

"Jacob Bryan Fisher entered the world in the wee hours of the morning on Monday," she wrote on Instagram on Wednesday. "His mom, dad and big brother couldn’t be happier for God to trust them with taking care of this little miracle! Our hearts are full, our eyes are tired and our lives are forever changed. Life is good."

In the photos she posted, Underwood, her husband Mike Fisher and their oldest son, Isaiah, are seen holding and smiling at the new addition to the family.

Underwood, 35, announced she was expecting last August after explaining why she was holding off her "Cry Pretty" tour till May of this year.

"You may be asking, 'Why is your tour starting in May [2019]?'" she wrote.

The camera zoomed out to show her sitting under a sign that read "Baby."

"Mike and Isaiah and I are absolutely over the moon and excited to be adding another little fish to our pond," she said. "This has just been a dream come true."

The singer welcomes the boy after she made waves telling Redbook magazine, "I'm 35, so we may have missed our chance to have a big family."

While Underwood was speaking strictly about her own family, some took to social media to let her know they believe that 35 certainly isn't too old to have a large family.

She later revealed in September that she had suffered three miscarriages over the past two years.

"I'd kind of planned that 2017 was, you know, going to be the year that I work on new music and I have a baby," she told CBS Sunday Morning. "We got pregnant early 2017, and it didn't work out."