Kim Kardashian West has announced the name of her new daughter three days after the baby was born via surrogate.
The baby has been named Chicago West, fitting in with the geographic theme Kardashian started with her first daughter, North West.
Kardashian announced the news with a series of tweets and a link to her app.
The first simply said "Chicago West", followed by another tweet saying "North, Saint & Chi", and then a retweet of a post on the pronunciation of "Chi".
The birth was announced on Monday, and Kardashian says her two other children were thrilled to welcome their baby sister.
Chicago was the first child born to Kardashian and her husband Kanye West via surrogate, after Kardashian experienced complications during her first two pregnancies.
The gestational carrier is said to be a woman from the San Diego area who been a surrogate twice before.
She was reportedly paid US$45,000 for the service.