Carrie Underwood is a mama!

On Tuesday, the 31-year-old shared the big news via a pic she shared on Instagram of a baby's hand and foot, announcing she gave birth last Friday.

"Tiny hands and tiny feet...God has blessed us with an amazing gift! Isaiah Michael Fisher - born on February 27. Welcome to the world, sweet angel!"

Carrie and her husband of almost five years, hockey player Mike Fischer, first met at one of Carrie's concerts in 2008, and were engaged in 2009.