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Kourtney Kardashian welcomes baby girl

Kourtney Kardashian and Scott Disick attend the AG Adriano Goldschmied's "backstAGe presents:" initiative on Feb. 14, 2011, in Las Vegas. Getty

(CBS News) Kourtney Kardashian and Scott Disick welcomed a baby girl on Sunday.

Pictures: Kardashian sisters
Pictures: Celebrity babies

The reality star's sister, Kim Kardashian, broke the news on her blog: "Welcome to the world, Penelope Scotland Disick! Kourtney gave birth to a beautiful baby daughter on Sunday and 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."

Penelope weighed in at 7 pounds, 14 ounces.

Kourtney, who had an all-natural birth, told 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,"

Penelope joins the couple's 2-year-old son, Mason.

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