Kim Kardashian and Kanye West Expecting a Child

Talk about onstage pyrotechnics!

Kanye West dropped a bombshell during an Atlantic City concert on Sunday night, revealing that he and girlfriend Kim Kardashian are expecting a child.

Kardashian later confirmed the news in a blog post titled,”New Year, New Beginnings.”

“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.”

Twitter also lit up with an outpouring of congratulatory messages from family members.

Oh BABY BABY BABY!!” shouts Kim’s mom Kris Jenner.

Adds sister Kourtney: “Been wanting to shout from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!

Kardashian, 32, and West, 35, went public with their relationship last April, about six months after Kardashian filed for divorce from Kris Humphries. The divorce action is still pending.

During Sunday’s concert at Revel Resort’s Ovation Hall, West was singing “Runaway” when he went into a freestyle ballad with the words “and now she’s having my baby.” The crowd of 5,000 broke into cheers.

Then on the last song, “Lost in the World,” he cut the music and asked the audience to applaud for his baby mama.