The party's not over yet! Kendall Jenner goes make-up free in crop top and overalls as she jets to Mexico with Hailey Baldwin to meet birthday girl Kylie

She has already had two parties to celebrate her 18th birthday.

But Kylie Jenner is not done with the festivities just yet.

On Wednesday her big sister Kendall Jenner and BFF Hailey Baldwin were spotted at Los Angeles International Airport.

Scroll down for video 

The model life: Kendall jetted out of Los Angeles International Airport with best friend Hailey Baldwin on Wednesday

The model life: Kendall jetted out of Los Angeles International Airport with best friend Hailey Baldwin on Wednesday

According to Us Weekly, Kylie caught a private jet to Mexico with boyfriend on Tuesday, and it is believed that Kendall and Hailey are now travelling there to meet her.

Kendall made sure she would be comfortable for the journey, but still looked chic at the same time.

The 19-year-old flashed a sliver of her flat stomach in a pair of cosy grey overalls, worn over a simple white crop top.

Casual but chic: The 19-year-old showed a little skin in a pair of grey overalls with a white crop top and trainers
Casual but chic: The 19-year-old showed a little skin in a pair of grey overalls with a white crop top and trainers

Casual but chic: The 19-year-old showed a little skin in a pair of grey overalls with a white crop top and trainers

Kylie here we come!: It is believed that the pair were heading to Mexico to meet Kendall's little sister, and continue her 18th birthday celebrations

Kylie here we come!: It is believed that the pair were heading to Mexico to meet Kendall's little sister, and continue her 18th birthday celebrations

Kendall also sported white trainers, and she was travelling light on the plane with just a black leather bowling bag.

The reality star turned model showcased her natural beauty as she went make-up free underneath her designer sunglasses, and she wore her dark hair poker straight.

Meanwhile Hailey was also keeping it casual in a cream soft knit jumper which flashed her white bra underneath, along with ripped jeans and tan trainers.

Natural beauties: Both Kendall and Hailey went make-up free under their sunglasses and wore their hair down

Natural beauties: Both Kendall and Hailey went make-up free under their sunglasses and wore their hair down

Let it rip: Hailey, 18, flashed her white bra in a knitted jumper, paired with ripped jeans and beige trainers
Let it rip: Hailey, 18, flashed her white bra in a knitted jumper, paired with ripped jeans and beige trainers

Let it rip: Hailey, 18, flashed her white bra in a knitted jumper, paired with ripped jeans and beige trainers

The 18-year-old also carried a jacket in case she should get cold on the plane, and sported oversized tortoiseshell sunglasses.

Like Kendall, Hailey was make-up free and wore her blonde hair down.

Both of the models, who just got matching broken heart tattoos on their fingers, attended Kylie’s star-studded birthday party in Los Angeles on Sunday night.

A very special occasion: The BFFs attended Kylie's 18th birthday party together in LA on Sunday night

A very special occasion: The BFFs attended Kylie's 18th birthday party together in LA on Sunday night

Steal Kendall's style with her khaki Forever 21 dungarees

Sometimes we forget about the fame, multi-million dollar houses and notorious family, and remember that Kendall Jenner is just a normal teen.

Almost as if to prove our point, the model and reality star showed off her down-to-earth side by turning to the high street for her clobber. That's right - these gorgeous dungarees are actually by Forever 21 and will set you back just $27.90!

Dungarees are huge news this season thanks to the likes of Stella McCartney and Frame Denim, yet Kendall's high street pick has some of the most original details we've seen!

The pleats, the wide-leg culotte shape, the soft khaki feel - it's all going on! Click (right) to buy yours now and style with a cropped white tee and sneakers, or glam it up with courts and a slick of lippy.

If you fancy a shop around before you buy though, the high street has got you covered. Go 90s at ASOS, or nab a bargain at PrettyLittleThing.com

* PRICES MAY NOT BE AS ADVERTISED
Forever friends: Kendall and Hailey just got matching broken heart tattoos on their fingers

Forever friends: Kendall and Hailey just got matching broken heart tattoos on their fingers

Alien happy face: The model displayed quite the sense of humour as she shared a close-up shot of herself wearing an unusual smiley face on her forehead 

Alien happy face: The model displayed quite the sense of humour as she shared a close-up shot of herself wearing an unusual smiley face on her forehead 

Kylie also had a birthday dinner with her famous family two days earlier.

On Sunday, the youngest member of the Kardashian-Jenner clan will be hosting a party in honour of the milestone occasion at Beach Club in Montreal, Canada. 

The day after her birthday, Kylie shared an Instagram photo of her brand new Ferrari – gifted to her by her 25-year-old rapper beau – on the tarmac next to a private plane, along with the caption: ‘GONE’. 

Already on holiday: Kylie and Tyga, seen here at Sunday's party, are believed to have jetted to Mexico on Tuesday

Already on holiday: Kylie and Tyga, seen here at Sunday's party, are believed to have jetted to Mexico on Tuesday

'GONE': The reality star shared a photo on Instagram showing her brand new Ferrari (given to her by Tyga) next to a private plane

'GONE': The reality star shared a photo on Instagram showing her brand new Ferrari (given to her by Tyga) next to a private plane

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now