It’s official, Kourtney Kardashian is pregnant.

“I found out I was pregnant,” Kourtney, 30, told Ryan Seacrest on E! News Wednesday.

The E! reality personality learned that she is expecting her first child after she began feeling ill just as she wrapped up filming on her new show, Kourtney and Khloe Take Miami, premiering Sunday.

“We were in the Everglades and I kept feeling nauseous and sick and I just kept thinking, like, something wasn’t feeling right,” said Kourtney, who is due in December. “I’ve never missed a period in my [life.].”

“I took like 20 tests,” she said. “I went to the doctor and he confirmed the news and I was just so shocked.”

Kourtney — who has been involved in a longterm on-again/off-again romance with ex Scott Disick — did not reveal the identity of the baby’s father.