From matching Halloween costumes to designer Balmain jackets, Kim Kardashian's oldest daughter North West and Kourtney Kardashian's little girl, Penelope, have formed a strong friendship over the years.
However, Kim has now revealed she can't wait for her youngest daughter and her newborn niece, Kylie Jenner's baby girl, to become best friends as they grow up, too.
Following the birth of daughter Chicago West last month and Kylie's daughter last week, the 36-year-old has taken to her website to congratulate her sister on the birth of her first child.
On her website, Kim wrote: 'Mommy Kylie!!! You did it!!! I'm so incredibly proud of the woman you have grown up to be and I know that you are going to be the best mom to your new baby girl!'
The star - who's daughter Chicago made her debut to the world in Kylie's pregnancy video - also wrote about her excitement at the fact their daughters were born weeks apart.
'Our girls are two weeks apart and I can't wait for them to be besties!
She added: 'I am so proud that you do what you want to do and live your life the way you want, you will pass down all of those amazing qualities to your baby girl. You were made to be a mom! I love you!'
Kim welcomed her third child via surrogate last month and told her fans via her website: 'The connection with our baby came instantly and it's as if she was with us the whole time. We are so excited to finally welcome home our baby girl.'
In other Kardashian pregnancy news, Khloé Kardashian is currently seven months pregnant and is due to give birth to her first child in March/April.
Struggling to keep track of the Kardashian/Jenner clan?
Check out our who's who guide to the family's brood here.
Katie O'Malley is the Site Director on ELLE UK. On a daily basis you’ll find Katie managing all digital workflow, editing site, video and newsletter content, liaising with commercial and sales teams on new partnerships and deals (eg Nike, Tiffany & Co., Cartier etc), implementing new digital strategies and compiling in-depth data traffic, SEO and ecomm reports. In addition to appearing on the radio and on TV, as well as interviewing everyone from Oprah Winfrey to Rishi Sunak PM, Katie enjoys writing about lifestyle, culture, wellness, fitness, fashion, and more.
