According to E!
Kanye made the announcement during his third consecutive performance at Revel in Atlantic City Sunday night.
"Now you having having my baby," Yeezy told a crowd of over 5,000 in song form, The Associated Press
reports. The crowd cheered.
Fans, friends, and family took to Twitter to congratulate the couple.
"Well at least I wasn't the 1 who told, but congrats @kanyewest and kimkardashian," wrote
G.O.O.D Music affiliate Malif Yusef.
"Been wanting to shout this from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!" Kim's older sister Kourtney
Kim's mother, Kris Jenner wrote
, "I'm a happy girl!!!!!! WOWZA! Oh BABY BABY BABY!!"
Kim is about 12 weeks pregnant, E!
She and Kanye went public with their relationship
in April, 2012.