Kourtney Kardashian is most definitely pregnant with her first child, E! news reports.

E! News this evening in a post on Twitter, “Watch Kourtney break the news she's preggers on @ENEWS TONIGHT at 7/6central and 11:30pm. She will be talking about it on our show tonight!”

The 30-year-old reality TV star - and oldest of the Kardashian sisters – said she is not spilling the beans on who is the baby’s daddy, though it’s likely that the father isScott Disick, her newly-reinstated fiance.

“You’re going to have to see on the show [if we get back together],”Kourtneysaid, referring to her new reality show with Khloe, Kourtney and Khloe Take Miami, which debuts this Sunday on E!