The youngest of the Kardashian-Jenner clan at 17, she admits she "felt blessed" when she heard the good news.
Thanks for 30 million followers on Instagram! pic.twitter.com/T2UPoclQer— Kylie Jenner (@KylieJenner) July 24, 2015
Posting a stunning selfie on social media, she wrote: "30 million followers?! I just found out I'm in the top ten most followed on Instagram and #1 viewed person on snapchat this is still CRAZY to me.
"Blessed to feel loved & when I launch my website I have many ideas to give that love back I can't wait!!!"
In the accompanying photo, Kylie's ever-changing locks are black and wavy, while her make-up is perfectly contoured. And her eyes look amazing!
The momentous news came the day after Kylie and her sister Kendall graduated from high school and enjoyed a surprise garden party at their mum Kris' house.
Wearing a traditional cap and gown, Kylie posed in front of silver balloons spelling out 'congratulations' and also snapped an obligatory selfie holding her graduation certificate.
Earlier in the week, Kylie surprised fans when she announced her graduation. She tweeted: "I finished school last week and I know I never post on social media when I'm in class but that doesn't mean I don't encourage education because I do!"
Kylie was homeschooled by a tutor for three to four hours every day.
After receiving some negative feedback, Kylie felt forced to defend herself in several Twitter posts.
She said: "That's what's wrong with today. If you don't show or "prove" to social media that you've done something it's like it never happened!
"My reality is... I only show people what I want them to see. No one knows what goes on in my day to day but me & who I share my moments with."
That's what's wrong with today. If you don't show or "prove" to social media that you've done something it's like it never happened!— Kylie Jenner (@KylieJenner) July 24, 2015
All you need to know about Kylie Jenner!
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