Kourtney Kardashian will be hosting the family's Christmas brunch.

Kourtney Kardashian

Kourtney Kardashian

The 'Keeping Up With The Kardashians' star has revealed she will welcome her sisters - Kim Kardashian West, Khloe Kardashian, Kendall Jenner and Kylie Jenner - and their families to celebrate the festive holiday with her.

In a post on her app, she shared: "My dining room is one of my favourite rooms in my house. I use the space to entertain - it's perfect for when I have the whole family over ... I'll have a big buffet in the kitchen and set up the table for everyone."

Meanwhile, Scott Disick is likely to be there for the Christmas festivities after the 37-year-old star got back together with the father of her three children - Mason, six, Penelope, three, and 23-month-old Reign.

A source said: "He has been consistently on his best behaviour for the past two months. He's not been partying or drinking. This is the first time we've seen Scott be this good in a very long time. Yes, that is always something Kourtney wanted for Scott - to calm down and be at home."

Whilst another insider added: "Their love for each other never went away. He's been trying to win Kourtney over for a while now, but his constant partying was a huge issue. He's been spending a lot more time with Kourtney and the kids and proving himself to show that his family is the priority ...

"He's doing his best to keep himself in check. Kourtney is definitely the reason for that. He still has his own place, but he loves her. He's always loved her and wanted his family back together. They're best friends - that's never changed, even when things were rough between them ...

"Scott has just been over the partying. He got sick of it and decided to clean up his act. He was having people over at his house to party until 6 a.m. all the time, and he hasn't been doing that either."