East Hampton, New York - Surprise! Hilaria Baldwin and husband Alec Baldwin have secretly welcomed their sixth baby together, just months after their son Eduardo was born.

The 37-year-old author revealed to People in November that the couple "feels very much done" with having kids, admitting she was "so tired" from trying to keep up with her large family.

Well, looks like she changed her mind...

Hilaria took to Instagram on Monday, showing herself surrounded by all of her loved ones – including a newborn in her lap!

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"7," she captioned the post, in reference to her six children and Alec's 25-year-old daughter Ireland Baldwin.

The celebrity couple already share five children together: sons Edu, Romeo Alejandro David, Leonardo Ángel Charles, and Rafael Thomas, as well as daughter Carmen Gabriela. Their newborn's name has not been revealed.

Hilaria said that her kids kept asking when they would have their next sibling.

"My kids are used to new siblings coming in, so they're already like, 'When is the next one going to come?'" she told People in November.

"They love babies," Hilaria added. "It's really amazing and comforting to see them like that because I know they're going to be the kind of adults who are really good with kids because they just know so much already."

The yoga studio owner and mother of six recently came under fire on social media for allegedly misrepresenting her Spanish heritage.

The dust has since settled, and the Baldwins seem happier than ever with the newest addition to their family.