Kim Kardashian and Kanye West have officially shared the name of their brand new baby daughter, and the little sister to North and Saint evidently took inspiration from an American city.

Yup, Chicago West is now officially the couple's third child, Kim and Kanye announced collectively on Kim's website.

"Chicago West January 15, 2018 12:47am 7lbs 6oz," was all that a small note read.

Kardashian first confirmed she was expecting a child via surrogate in a September 2017 preview of Keeping Up With The Kardashians. In the clip, Kardashian appeared on FaceTime with her sister Khloe when the conversation got serious. “What happens every time I say, ‘Guess what?’” Kim asked, to which Khloe replied, “The person’s pregnant.”

Kardashian announced on January 16 that her baby had been born with a note on her official blog.

"Kanye and I are happy to announce the arrival of our healthy, beautiful baby girl," she wrote. "We are incredibly grateful to our surrogate who made our dreams come true with the greatest gift one could give and to our wonderful doctors and nurses for their special care. North and Saint are especially thrilled to welcome their baby sister."

Kardashian's sister, Khloe, also announced she's expecting a baby this year.

"I think if it's a boy I'll go with Junior, Tristan Jr., but for a girl I don't know where to begin," she confessed The Ellen Degeneres Show. "I want a 'K' or a 'T.'"

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