Kourtney Kardashian and Scott Disick
07/09/2012 at 01:25 PM EDT
A new reality star is born!
and boyfriend Scott Disick
have welcomed their second child
, a daughter named Penelope Scotland Disick, born early Sunday at Cedars-Sinai Medical Center in Los Angeles, reports E! News
"Scott and I are overjoyed to welcome our precious angel Penelope Scotland Disick into our lives. We are forever blessed. Mommy and baby are resting comfortably," the Keeping Up with the Kardashians
star – who, with Disick, is already parent to 2½-year-old son Mason
– told E! News.
Their new arrival weighed 7 lbs., 14 oz., and was delivered via all-natural birth, according to the report.
"It was a great. She had an easy delivery," matriarch Kris Jenner told E! "[Penelope] is so cute. She looks just like Mason. She's so beautiful. We are so happy."
On Monday, sister Kim
shared her elation on her blog
, writing, "The whole family is so thrilled to finally meet her! She is absolutely perfect! I am so excited to be an aunt again and can't wait to spoil little Penelope. I know Mason is going to be the best big brother in the whole world."
And her sister, Khloé
followed suit: "I'm an auntie again!!!!!!!!!! As I'm sure you all know, my beautiful big sister gave birth yesterday to the most perfect baby girl you've EVER seen," she wrote on her blog
. "The entire family is literally exploding with joy and have not stopped fawning over our new little girl. And Mason is already loving being a big brother! This is just such a special and happy time for my family."
Describing her pregnancy
with Penelope, Kardashian, 33, told PEOPLE in April
: "I feel really good ... [though] this time I had a little more morning sickness. I think it's a little bit harder being pregnant when you have a toddler I'm chasing after. Last time I could nap more."