Kourtney Kardashian's Baby Girl Arrives in the Spring

Kim Kardashian can't wait to meet her niece.

The reality TV star's sister, Kourtney, revealed Wednesday (02-22-12) she and her partner Scott Disick are expecting a baby girl this spring - a sister to their two-year-old son Mason - and Kim is excited at the news.

She posted on her official website: "Kourtney is having a baby girl!! The whole family is so excited! Mason is going to have a little sister!. Congratulations, Kourtney and Scott. I can't wait to meet her! Xo (sic)."

Kim was a little later than some of her family to send her well wishes about the baby news, as she was in transit to Philadelphia to stand in for Kourtney on shopping channel QVC when the news broke.

She tweeted: "Just landed in Philly! . I know Kourtney was scheduled to be selling live on QVC, but she wasn't feeling good, so I'm taking over! (sic)"

Kim and Kourtney's other sister, Khloe, also tweeted her excitement at the family's new edition.

She wrote: "@KourtneyKardash and @ScottDisick are having a baby girl!!!! OMG I can't wait to buy her a glitter tutu LOL (sic)."

Other well wishers on twitter included the Kardashian's half sister Kendall Jenner, and their mother, Kris Jenner.

Kris tweeted: "Can't wait to go buy something PINK! What a blessing! (sic)"

©Bang Showbiz