Kourtney Kardashian has a new family member she'll need to keep up with.

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The Keeping Up With the Kardashians and Kourtney and Khloe Take Miami star and her boyfriend Scott Disick welcomed their first child -- a baby boy -- on Monday morning, E! News reported.

Mason Dash Disick -- whose middle name is a reference to the Kardashian sisters' Dash boutique -- was born in a Los Angeles-area hospital weighing 7 lbs., 6 ounces and measuring 19.5 inches.

"Kourtney just delivered a healthy baby boy about an hour ago," her publicist told E! News on Monday morning.

Kardashian announced she was pregnant in August and the family threw her a baby shower last month at Kris and Bruce Jenner's house in Calabasas.

On Thursday, Khloe and Kim Kardashian told Ryan Seacrest on his KISS-FM radio show that their sister was "due any minute."

Keeping Up With the Kardashians' fourth season premiered last night on E! and featured Kourtney's family members -- especially Kris and Khloe -- vocally expressing their concern about Disick becoming a part of the family as the father of her baby.
About The Author: Christopher Rocchio
Christopher Rocchio is an entertainment reporter for Reality TV World and has covered the reality TV genre for several years.