Kanye West says girlfriend Kim Kardashian is pregnant Page last updated at 10:58 GMT, Monday, 31 December 2012 By Anthony Baxter Newsbeat reporter The rapper Kanye West says Kim Kardashian is pregnant with his baby Kanye West has announced his girlfriend, the American reality TV star Kim Kardashian is pregnant. The rapper made the announcement at a concert in Atlantic City on Sunday 30 December. He told the crowd of more than 5,000 by singing: "Now you having my baby." Later some of Kim's family confirmed the news on twitter. Her sister Kourtney Kardashian posted "been waiting to shout from the rooftops with joy and now I can." The message went on to say: "Another angel to welcome to our family. Overwhelmed with excitement! Beyonce, husband Jay-Z, Kanye West and his girlfriend Kim Kardashian sat together in the front row of the BET Awards in July. Kim's other sister Khloe wrote: "I'm excited for Kanye and my sister! There's nothing like bringing life into this world! Kanye West also told people at the concert to congratulate his "baby mom" and that this was the "most amazing thing." The couple started dating in March. Kim Kardashian is best known for her role in the American reality show, Keeping Up With The Kardashians. In 2011 she split from her husband, the basketball payer Kris Humphries after just 72 days.