A source told E! News the newest member of the Kardashian family "has dark hair" and "looks just like Kim."
There is no word yet on the baby's name, but E! reports the 32-year-old reality star told friends and family it "will start with a K."
Kim's delivery came five weeks sooner than expected, but sources close to the family say the baby and Kim are in good health.
Power couple Kim Kardashian and Kanye West welcomed their first child on Saturday, and according to sources, Kim may already have a Mini-Me on her hands.