Kendall Jenner Celebrates 18th Birthday

Kendall Jenner has been celebrating her 18th birthday in California over the weekend - and has been keeping her Instagram followers posted.

The Keeping Up With The Kardashians star and the rest of her clan took over an entire amusement park - Six Flags Magic Mountain in Santa Clarita - on Saturday evening.

Big sis Kim Kardashian posted a Keek video in which she said: "We're here for Kendall's birthday party and we rented out Magic Mountain. No one else is in the entire theme park but us and the people there to greet us.

"But look, no one's even working in the concession stands. And we get to drive instead of walk. This is real lazy, but this is what Kendall wanted and it is a nice surprise for her and I'm excited for her. So happy birthday Kendall."

And they continued the festivities yesterday with a birthday dinner with friends and family.

Kendall posted a snap of herself and her pal Spencer Johnson wearing decorative masks on Instagram - and another with sister Khloe Kardashian.

She also shared a snap of her bedroom decorated with "happy birthday" and "birthday princess" banners.

Pictures © Instagram / Kendall Jenner

SEE SEXY PICS OF KIM KARDASHIAN HERE!