Kourtney Kardashian gave birth to a baby girl, Penelope Scotland Disick, in Los Angeles on Sunday, according to Kim Kardashian's website.
Kourtney Kardashian's new arrival joins her 2-year-old son, Mason, with boyfriend of five years Scott Disick, 29. Kardashian gave birth at the Cedars-Sinai Medical Center, according to E! News.
"She (Penelope) is absolutely perfect! I am so excited to be an aunt again and can't wait to spoil little Penelope," Kim wrote on her blog.
"I know Mason is going to be the best big brother in the whole world. Congratulations Kourtney and Scott. Xo," she added.
The 33-year-old reality star and eldest sister of the Kardashian clan, had an all-natural birth and her baby girl weighed 7 pounds, 14 ounces.
"It was a great. She had an easy delivery," matriarch Kris Jenner said. "[Penelope] is so cute. She looks just like Mason. She's so beautiful. We are so happy."
Kourtney has not decided whether she will reveal the pregnancy on their reality show, "Keeping Up With the Kardashians," like she did the last time.
"I don't know," Kourtney said on the Tonight Show a few weeks ago. "We're gonna film it again ourselves, and honestly, my experience last time was so peaceful and calm and everything you don't see in the movies. And I really wanted to share that with people so they knew it doesn't have to be a crazy screaming session."
