The mum-of-three and her children dressed up as superheroes on Saturday and shared several pictures of the fun affair on Instagram. One snap showed Kourtney, 36, in a Wonder Woman costume whilst her kids, Mason, Penelope and Reign, matched in similar superhero outfits.
Kourtney Kardashian, her kids and her niece North West dress up for a Halloween party
The Kardashians have previously shared their love for Halloween and recently Kim revealed: "I LOVE Halloween. Every year on Halloween as a kid I would celebrate my birthday since my birthday is so close."
However, it seems this year, Kim, who is heavily pregnant with her second child, is limited for costumes choices but is already thinking about next year's.
Kourtney and her three kids, Mason, Penelope and Reign
"I need to think of such a major costume for next year! This year, I am obviously limited", she revealed on her website. Looking back at her choices over the years, the mum-of-one certainly has favourites: "I think my favorite was Princess Jasmine and our Batman theme. I love how all of my friends and family were different characters".
It seems the pregnant star didn't join the gang for the fun activity as she later revealed on Twitter that she had been busy hosting a birthday bruch for her biggest fans.
"I just had the best brunch today I flew out every fan I follow on social media to celebrate my birthday!!! I loved putting all of the faces with the names & am so grateful for all of the fan accounts!," she wrote.
"I wish I could have flown out more people but I'm making this a tradition and will start selecting new fan accounts soon! I love you guys so much and am so grateful to have met you guys today! Can't wait to post all of the pics & video on my website & app."
Luckily for those fans, Kim's husband and daughter also managed to make an appearance. "So happy Kanye brought North to celebrate too & meet everyone! #BestBrunchEver #BdayEvent"