What a way to start off the new year! Kanye West and Kim Kardashian are expecting a child together.

The rap star made the announcement during  a show at Revel Resort's Ovation Hall Sunday night (Dec. 30). "Now you having my baby," referring to his reality TV star girlfriend in song form while onstage performing for a packed house.

West also told concertgoers to congratulate his "baby mom." The 35-year-old 'My Beautiful Dark Twisted Fantasy' creator said the news was the "most amazing thing."

E! News confirms the couple, who went public with their relationship in March, are indeed expecting. Kardashian, 32, is reportedly 12 weeks pregnant. Her sisters expressed their excitement for Kimye -- the name coined for Kardashian and West -- via Twitter.

"Keeping secrets is hard with so many family members! Especially when you are so freaking excited!!!!! LOVE is everything!!!!" Khloé Kardashian Odom wrote. "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 also shared.

Never one to hold his tongue, there are sure to be many Kimye baby lyrics to come from Kanye West. After all, this is the man who's rapped about his lady love on more than one occasion. On 'Clique,' he made reference to Kardashian in a way that sent the internet into a frenzy ("my girl a superstar all from a home movie") and on the track 'Cold,' he was a bit more heartfelt ("and I admit, I had fell in love with Kim").

Are you surprised with the news? What do you think they'll name the baby? Let us know in the comments below.

Watch Kanye West in G.O.O.D. Music's 'Mercy' Video