ATLANTIC CITY, New Jersey (AP) - If you're keeping up with the Kardashians - you'll soon have one more of them to track. Kim Kardashian is pregnant. Kanye West - her latest man - shared the news with members of his audience at a show in Atlantic City, New Jersey. West sang of his girlfriend: "Now you having my baby." It's their first child as a couple. West asked the audience to congratulate his "baby mom" and that their impending news is "the most amazing thing." Reps for the rapper and Kardashian didn't immediately respond to emails about the pregnancy - though Kourtney Kardashian and Kris Jenner both tweeted about baby news. The couple went public with their relationship in March. Kardashian married NBA player Kris Humphries in August 2011 - their divorce is not finalized.