Oh to be rich, beautiful and 21 years old.

Model Kendall Jenner has just turned 21 years old and celebrated like a true celebrity with a lush party where she invited all of her closest friends and family.

Jenner dressed to impress with a sparkly frock which paid homage to party girl Paris Hilton's 21st outfit from 2002.

VIBES. PARIS x KENDALL. 21st birthday! 💎✨

A post shared by Kendall Jenner Closet (@kendalljennercloset) on

The special birthday outfit was a Swarovski crystal LaBourjoisie slip dress that cost a reported $9,000USD and took 7 days to make.

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Some of Kendall's besties posted on social media to wish her a happy birthday.

Gigi Hadid

🍸 Happiest Birthday weekend my Ken ❤️

A post shared by Gigi Hadid (@gigihadid) on

Fellow model friend shared a cute picture with the caption "Happiest Birthday weekend my Ken."

Karlie Kloss

Happiest of days to this bday queen @kendalljenner 🎉 love ya lady! ❤️💃🏻❤️

A post shared by Karlie Kloss (@karliekloss) on

Karlie shared a post from a girls night at a Lakers game: "Happiest of days to this bday queen @kendalljenner love ya lady!" she said in the caption.

Hailey Baldwin

Happy 21st birthday to my babe. I love you lots, happy to be here with you tonight ❤️❤️ @kendalljenner

A post shared by Hailey Baldwin (@haileybaldwin) on

"Happy 21st birthday to my babe. I love you lots, happy to be here with you tonight," she said.

Joan Smalls

Smalls shared a picture of the pair at the Met Gala earlier this year.

"Happy 21st birthday to my babe. I love you lots, happy to be here with you tonight," she said.