has come of age – and the Kardashian clan marked the pretty teen's milestone 18th birthday with an intimate family party and a series of Twitter snaps and sweet messages.The birthday girl and her nearest and dearest celebrated on Sunday with Kendall blowing out the candles on a delicious-looking white-frosted cake at a masquerade bash, during which they donned bejeweled masks.
This was after proceedings go off to a start last Tuesday, when the family rented out LA theme park Six Flags Magic Mountain.Looking on this Sunday were sistersKim Kardashian
, Khloe Kardashian and Kylie Jenner, mumKris Jenner
as well as Kendall's friends Spencer Johnson, Nicolette Sage and Skye Savoy.Leading the felicitations on Twitter was Kim, who wrote: "Happy 18th Birthday to the sweetest girl I know @kendalljenner I hope your adult years are filled with happiness & so much."
The message accompanied pictures of Kendall as a little girl with ribbons in her hair and another of her as a young teen, glammed up for what looked to be a modelling shoot.Khloé chipped in with a photo captioned "birthday girl", of herself and her sister in masks.Earlier, the emotional sister had shared a collection of pictures of the two together, writing: "Happy birthday Kendall!!!!! 18 years ago my life was changed forever because of you!"The joy and peace you bring to so many lives are just a few of the rare gifts your spirit possess. I couldn't be prouder of the woman you are becoming. Happy birthday to my best friend, my roommate, my puppy sister, my heart. Sisters by blood, best friends by choice."