FLUFF: One of the Kardashian sisters is pregnant.

We’ll give you a clue. The lucky sister’s name starts with a ‘K’.

Yeah, for a weird and beautiful moment there, we thought it was Kim too. But no, North West isn’t getting a sibling just yet.

It’s 35-year-old Kourtney who’s expecting.

Multiple sources are reporting the 35-year-old Kardashian sister is expecting a baby.

In an episode of Keeping up with the Kardashians airing this weekend, viewers will be able to watch Kourtney tell her partner Scott, “I’m pregnant” – and see his reaction.

A source reportedly told PEOPLE magazine, “She’s really excited but she’s nervous too … Three kids is a lot to handle! But she’s happy — she’s always wanted a big family with Scott.”

Kourtney and her partner Scott Disick already have two children together – four-year-old Mason and one-year-old Penelope.

Follow Mamamia Fluff on Facebook

Mamamia Fluff brings you the most awesome celebrity news and gossip from around the world.

When famous people misbehave, get married, have babies, or do something ridiculous – you’ll be the first to know.