Kylie Jenner's family congratulate her after baby's birth

Kylie Jenner's sisters were some of the first people to congratulate her following her big baby news. 

The 20-year-old reality star took to social media on Sunday night to announce the birth of her baby girl, who was born on Friday. 

"I’m sorry for keeping you in the dark through all the assumptions. I understand you’re used to me bringing you along on all my journeys. My pregnancy was one I chose not to do in front of the world," she wrote on social media. 

The new mom shared an 11-minute video of her pregnancy journey on YouTube. 

The video not only showed off Kylie's baby bump, but the world also got a glimpse of Kim Kardashian's new daughter, Chicago 'Chi' West.

Kim was seen introducing the baby to Kylie. 

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Kylie's boyfriend, rapper Travis Scott, and his family also make an appearance.

Congratulations have been pouring in for the star.

Her big sister Khloe Kardashian, who is also expecting her first child, shared a throwback picture of their baby bumps. 

"Congratulations My Sweet Kylie! What a magical ride it's been! I'll miss you bumping along with me. Never in a million years did I think we would do this together but it's been that much more special because of it. God is so great!! He had His plan all along! I love you little mama," she captioned the image - which already has over six-million likes.

Kris Jenner also shared her excitement on Instagram.

"God is SO good!! I am so excited and thrilled to welcome another precious baby girl to our beautiful, ever growing family. We are blessed beyond belief!"

Kylie's best friend, Jordan Woods, was proud of the new mom.

"Your growth and maturity over this time never failed to amaze me. So excited for this new addition! Wifey 4L."

Travis announced his daughter's arrival on Twitter as well. 

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