ATLANTIC CITY, N.J. -

Kim Kardashian has confirmed that she's expecting a baby with Kanye West.

Kardashian, 32, posted on her website Monday:

"It’s true!! Kanye and I are expecting a baby. We feel so blessed and lucky and wish that in addition to both of our families, his mom and my dad could be here to celebrate this special time with us. Looking forward to great new beginnings in 2013 and to starting a family. Happy New Year!!! Xo."

Kanye had announced Sunday night that his girlfriend is pregnant. He told the crowd of more than 5,000 at Revel Resort's Ovation Hall in song form: "Now you having my baby."

The crowd roared.

Most of the Kardashian clan tweeted about the news, including Kim's sisters and mother. Kourtney Kardashian wrote: "Another angel to welcome to our family. Overwhelmed with excitement!"

West, 35, also told concertgoers to congratulate his "baby mom" and that this was the "most amazing thing."

The rapper and reality TV star went public in March.

Kardashian married NBA player Kris Humphries in August 2011 and their divorce is not finalized.

Twitterverse explodes

Within minutes, the hashtag #Kimye took off on Twitter -- as did the inevitable ribbing.

Some poked fun at West's healthy ego, saying Kanye will name his baby "Kanye" -- or perhaps "Babye."

Others alluded to West's infamous interruption of singer Taylor Swift's MTV Video Music Awards speech in 2009 when he grabbed her microphone and let loose an outburst on behalf of singer Beyonce Knowles who had lost out in the Best Female Video category to Swift.

"Taylor, I'm really happy for you, and I'm gonna let you finish, but Beyonce had one of the best videos of all time," West said that night.

Judging from the tweets Monday morning, that incident is still fresh on many minds.

Said someone who uses the handle @FSUSteve: "I don't mean to interrupt Kanye's special announcement, but Beyonce's was much better."

Kim Kardashian, Emmys