Kanye West announced that his girlfriend Kim Kardashian is pregnant during a concert in Atlantic City on Sunday night.

West, 35, dropped the bombshell to more than 5,000 fans at the concert at Revel Resort's Ovation Hall singing "Now you having my baby" to loud cheers from the crowd, according to the Associated Press. He asked them to congratulate his "baby mom," saying the pregnancy was the "most amazing thing."

Kardashian is reportedly 3 months pregnant, according to celebrities' website TMZ.com.

"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 wrote on her Twitter.

"Oh BABY BABY BABY!!" Kardashian's mother Kris Jenner wrote.

"KIMYE!," tweeted sister Khloe Kardashian Odom. "Keeping secrets is hard with so many family members! Especially when you are so freaking excited!!!!! LOVE is everything!!!," she added.Kardashian's family confirmed the news on Twitter following up with congratulatory messages.

West took the stage for nearly two hours, performing hits like "Good Life," "Jesus Walks" and "Clique." It was his third consecutive concert at the venue.

Many celebrities congratulated the couple on Twitter after the big news were revealed.

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

"It's true :) @KimKardashian & @KanyeWest are having a baby! congrats u guys," tweeted Ryan Seacrest.

"So happy for you @KimKardashian. Love you SO much and I'm so excited to babysit!! Miss you girly...Once again...SO happy for you!!! Xox."

Kardashian, 32, and West went public with their relationship in April. The reality TV star's divorce from NBA player Kris Humprhies is still pending.

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