The baby sister of North, 4-and-a-half, and Saint, 2, was born on Tuesday, with Kardashian writing on her website, "Kanye and I are happy to announce the arrival of our healthy, attractive baby girl". The hospital is known as the preferred place for Hollywood celebrities to give birth, and it's the facility where the couple welcomed Chicago's big sister North, 4, and older brother Saint, 2. She sent out a follow-up tweet saying "North, Saint & Chi".
The Keeping Up With the Kardashians star has always been open about her plans to expand her family.
Elsewhere on social media the name received a mixed reaction, with American football team Chicago Bears quick to make light of the title.
@deetellez wrote: "F the haters!" A lot of people think Kanye pressured Kim into the name Chicago, but Kim was actually all about it from the moment it was proposed.More news: Fit-again Sharapova focusing on positives despite Australian Open exit
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@TheJessLyf posted: "Chicago... West..."
We have to admit, "Chi West" is going to be a dope nickname - congrats, KimYe! "Chi West doesn't sound bad".
Check out more about Kim and her third child in the video below, and please SHARE if you think all of her children have pretty interesting names!
Kim announced the happy news of the baby's arrival in an emotional post on her website which read: "She's here!" According to E! News, doctors advised them to use a surrogate for their third child due to the mother's troubles with preeclampsia and placenta accreta during her past two pregnancies.
She added that her daughter North and son Saint, who she carried herself, are "especially thrilled to welcome their baby sister".