The reality star delivered son Mason Dash Disick on Monday morning at Cedars Sinai in Los Angeles, a source confirms to PEOPLE. The baby boy weighed in at 7 lbs., 6 oz., and measured 19.5 inches.
This is the first child for Kardashian, 30, and boyfriend Scott Disick, who announced her pregnancy in August. Kourtney’s due date was Dec. 23.
Kardashian, who stars on Keeping Up with the Kardashians and Kourtney & Khloe Take Miami, inititally agonized over whether to continue the pregnancy, and kept the identity of the father private.