14/08/2014 12:44 BST | Updated 20/05/2015 06:12 BST

Kourtney Kardashian Pregnant? The Star Addresses The Rumours

The rumours are true! Kourtney Kardashian is expecting her third child with partner Scott Disick.

The reality television star confirmed the news in a preview clip for the new series of Keeping Up With The Kardashians on Sunday and her sister Kim hinted the 37-year-old would be making the announcement before the show premiered.

"Kourtney will also be addressing pregnancy rumours this Sunday on our premiere! So be sure to tune in! #keepingupwiththeKardashians," she wrote on her Twitter page.

Kourtney Kardashian Meet-And-Greet At Kardashian Khaos Store At The Mirage

Kourtney, who is mother to 4-year-old Mason and 23-month-old Penelope, can be seen breaking the good news to Scott by simply telling him, "I'm pregnant. It was not a plan," during a conversation in their walk-in closet (yes, really).

She also talks to Kim and her mother Kris about the pregnancy in the new episodes of the TV show.

US Weekly hinted Kourtney was expecting in a report last week. A source told the magazine she was spotted at the Trump SoHo hotel in New York recently and "looked really pretty. She had a nice flush on her cheeks."

"It was planned," another insider added, as apparently Kourtney "wants to have a handful of kids".

There's no further news on the baby's gender yet, but the couple are said to be excited about welcoming their new arrival. "They just want the baby to healthy," the source said.

LOVE KOURTNEY? See more of the oldest Kardashian sister in her style file below: