Kim Kardashian, Kanye West Expecting First Child

Dec. 31, 2012— -- The Kardashian clan is about to have a new addition to the family now that reality-TV star Kim Kardashian is pregnant with Kanye West's child, according to her rep.

West, 35, broke the news Sunday night during a concert in Atlantic City. West told more than 5,000 concertgoers to congratulate his "baby mom" and that this was the "most amazing thing."

Kardashian, 32, confirmed the news in a blog post today.

"It's true!! Kanye and I are expecting a baby," she wrote. "We feel so blessed and lucky and wish that in addition to both of our families, his mom and my dad could be here to celebrate this special time with us. Looking forward to great new beginnings in 2013 and to starting a family. Happy New Year!!! Xo"

"KIMYE!," sister Khloe Kardashian Odom tweeted. "Keeping secrets is hard with so many family members! Especially when you are so freaking excited!!!!! LOVE is everything!!!," she added.

Soon after the tweet, the hashtag #Kimye took off on Twitter and was trending worldwide. Most of the Kardashian clan tweeted their excitement via Twitter.

Click Here to See More Photos of Kim Kardashian Through the Years

"Been wanting to shout from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!," tweeted Kardashian's other sister, Kourtney Kardashian, 33, who has two children of her own.

Kardashian's mother, Kris Jenner, expressed her excitement on Twitter, tweeting, "Oh BABY BABY BABY!!"

Congratulatory tweets are already pouring in for the future parents.

"Congrats to Kim and Kanye. Happy for both of them," Russell Simmons tweeted.

Kardashian filed for divorce from NBA star Kris Humphries October 2011 after 72 days of marriage. The divorce is not yet finalized.

West and Kardashian began dating in April.