Kim Kardashian's sister Kourtney gave birth to a girl on Sunday morning in Los Angeles.

Reality TV star welcomed a little girl named Penelope Scotland, weighing in at seven pounds, 14 ounces, at the city's Cedars-Sinai Medical Center. The new arrival is Kardashian's second child with her boyfriend Scott Disick.

She tells 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 couple is already parents to two-year-old son Mason.

The socialite's sister Kim also expressed her joy at becoming an aunt again in a post on her official website. She writes, "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. I know Mason is going to be the best big brother in the whole world. Congratulations Kourtney and Scott."