08/13/2009 at 01:30 PM EDT
Although the news that Kourtney Kardashian is pregnant
with her first child came as a quite a surprise, her family is excited about their new addition.
"I am beyond thrilled and excited and cannot wait
to meet my new grandchild!" mom Kris Jenner tells PEOPLE exclusively. "We are truly blessed."
A day after announcing her news, Kardashian revealed that her baby's daddy
is off-again, on-again boyfriend Scott Disick.
It shouldn't come as a surprise that the close-knit Kardashian-Jenner clan, whose lives are chronicled on the E! Series Keeping up with the Kardashians
, are supportive of Kourtney's new adventure.
Her sister Kim Kardashian
shared her excitement about the news on Twitter, writing: "CONGRATS to my sister Kourtney who is pregnant! I am going to be an auntie!!!! Aunti Kimmie!!!!"