Kim Kardashian is ready to be an aunt again. The reality star has taken to her blog to send love to her big sister [article id="1675120"]Kourtney, who just announced she's pregnant[/article] with her second child. Kourtney and boyfriend Scott Disick already [article id="1628215"] have a son, Mason[/article].

"I have some amazing news to share with you all! Kourtney and Scott are expecting their second child!!" Kim wrote in a post on Wednesday (November 30). "This is such a blessing and the whole family is beyond thrilled! I just know Mason will make the best big brother and I can't wait to meet my new little niece or nephew! Congratulations Kourtney and Scott."

Kourtney's sister Khloé is also excited to become an aunt again.

"I am BEYOND thrilled to fiiiiinally be able to share with all of you the fabulous news that my beautiful big sister Kourtney is expecting yet again!" she blogged. "Can you believe it?! Masey is going to be a big brother! We are all so overjoyed by this wonderful news and are counting down the minutes until we get to meet the newest member of our family.

"Kourtney is the greatest mom in the world and I am so proud of the woman she has become. I can't wait to see her with a kid in each arm!" Khloé continued. "She'll be a pro. LOL. And if this next baby is anything like Mason, then we will truly be the luckiest family in the world. Congratulations, Kourt, Scott and Mason!!!! I love you all more than anything!"

Kourtney, Kim, Scott, Mason and Kim's soon-to-be ex-husband, Kris Humphries, are all currently starring on the second season of "Kourtney & Kim Take New York." Coincidentally, Kourtney kicked off a mommy blog and web series for the E! website earlier this week, opening up about how she dresses her tyke.

Back in May, when MTV News caught up with Kourtney, she talked about the chances of a " Khloé & Lamar"-style spin-off for her and Scott. "Not yet!" she said. "I think there's enough going on that [Scott will] be on all of the other shows that we have going on."

Share your well-wishes with Kourtney and Scott in the comments section.