The supermodel shared the news on Saturday, announcing the birth of her and her husband's first child, Genevieve Upton Verlander.
She posted the closeup, black and white photo and captioned it simply with their daughter's name and birthdate, adding a pink heart emoji.
Verlander added a photo as well, writing, "Welcome to the world Genevieve Upton Verlander. You stole my ❤️ the first second I met you!!! 11.7.2018."
The couple has been married a little over a year after tying the knot in Italy in 2017.
Kate Upton announced she was pregnant in July.