Sources close to the reality star tell TMZ that Kim began having contractions last night and gave birth to a baby girl Saturday morning at Cedars-Sinai Medical Center in Los Angeles -- five weeks before her due date.
The sources add that the baby was delivered naturally.
Kim's baby daddy Kanye West was there during the delivery, according to reports.
This is the first child for Kim, 32 and Kanye, 36.
The baby's name was not released. During her pregnancy, Kim's style was constantly scrutinized. Check out some of her maternity looks in the gallery above!