Kourtney Kardashian and her long-term partner Scott Disick have revealed they are expecting a son.

The reality TV couple, who are already parents to son Mason, 5, and daughter Penelope, 2, are expected to welcome the new addition to their family some time before Christmas.

The news that they were expecting their second son was revealed during a recent episode of Kourtney & Khloé Take the Hamptons.  Middle Kardashian sister Kim shared a private home video on which the girls can be seen screaming in delight at the news. 

However as the ladies shared their happiness, dad-to-be Scott admitted that he was "nervous, very nervous". 

When Khloe pressed him about being "not that excited", he made it clear he wasn’t at first, but insisted, "I’m fine now. I’m excited."