Atlantic City, New Jersey — The Kardashian clan is getting bigger: Kanye West and Kim Kardashian are expecting their first child.
The rapper announced at a concert on Sunday night that his girlfriend is pregnant. He told the crowd of more than 5 000 at the Ovation Hall at the Revel Resort in song form: "Now you having my baby."
The crowd roared.
Kim's sisters Kourtney Kardahsian and Kendall Jenner and mother Kris Jenner also tweeted about the baby news.
Been wanting to shout from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!
— Kourtney Kardashian (@KourtneyKardash) December 31, 2012
Oh BABY BABY BABY!!
— Kris Jenner (@KrisJenner) December 31, 2012
whos excited about the KIMYE babbyyy?! :D weeee
— Kendall Jenner (@KendallJenner) December 31, 2012
West also told concertgoers to congratulate his "baby mom" and that this was the "most amazing thing".
Representatives for Kanye and Kim didn't immediately respond to e-mails about the pregnancy.
The rapper and reality TV star went public with their relationship in March. Kim married NBA player Kris Humphries in August 2011 and announced their separation 72 days later.
Their divorce is not yet finalised.