EXCLUSIVE PICTURES: Battle of the booty! Bella Hadid grabs hold of Hailey Baldwin's rear on bikini trip

They're both 19 and among the world's most sought-after models.

And BFFs Hailey Baldwin and Bella Hadid showed just how close they are during their Caribbean getaway to celebrate friend Kylie Jenner's birthday.

Bella, wearing a skimpy denim bikini, was pictured making a grab for Hailey's butt as she posed for a photo in a mint green two-piece during a boat trip in Turks and Caicos.

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Naughty! Hailey Baldwin got her behind grabbed by Bella Hadid as the two  joked about on a boat as they sailed around Turks and Caicos this week

Naughty! Hailey Baldwin got her behind grabbed by Bella Hadid as the two joked about on a boat as they sailed around Turks and Caicos this week

The two teens certainly have enviably pert derrieres which they weren't shy about showing off.

The model pals showcased their taut and toned physiques in their tiny bikinis as they soaked up the sun.

And at one point it looked as if their photographer pal was going in for a close-up of Hailey's particularly impressive rear. 

Click! Hailey, 19, posed in a mint green bikini on board the vessel and at one point it looked as if her photographer pal was going in for a close-up of her particularly impressive rear

Click! Hailey, 19, posed in a mint green bikini on board the vessel and at one point it looked as if her photographer pal was going in for a close-up of her particularly impressive rear

Snap me too! Not to be left out, Bella also made sure to show off her lean figure including her pert posterior as she posed on the yacht

Snap me too! Not to be left out, Bella also made sure to show off her lean figure including her pert posterior as she posed on the yacht

Go for denim like Bella in a denim bikini

Bella Hadid has joined Kylie Jenner's girl squad for a birthday bash in the Turks and Caico's.

Working serious supermodel vibes, the lithe model and sister to Gigi Hadid was on a yacht along with Kendall Kenner, Hialey Baldwin and Tyga.

We love her playful and summery denim bikini with a cool leaf stitched on the front and a frayed seam along the edges.

Shop the exact style she is rocking via the link to the right and pair your look with red/orange mirrored aviator sunglasses to get that supermodel look.

We also have a high-street edit below with picks from Guess, Revolve and Asos.

The Asos is a dead ringer for Bella's look!

* PRICES MAY NOT BE AS ADVERTISED
Cheeky: Bella also attempted to minimize her tan lines by scrunching up her high cut bikini bottoms even further
Cheeky: Bella also attempted to minimize her tan lines by scrunching up her high cut bikini bottoms even further

Cheeky: Bella also attempted to minimize her tan lines by scrunching up her high cut bikini bottoms even further

Taking a back seat: Hailey perched on the rail as Bella spread her arms wide to keep her balance as she tottered along   

Taking a back seat: Hailey perched on the rail as Bella spread her arms wide to keep her balance as she tottered along   

The two models joined friend and reality star Kendall Jenner, 20, for the beach day along with Kylie who turned 19 on Wednesday and her rapper boyfriend Tyga, 26. 

Kendall just landed the cover of the prestigious September issue of Vogue and like her pals, she wasn't shy about showing off her flawless figure in a teeny burgundy two-piece.  

And the girls are clearly all very close as they spent hours frolicking in the ocean and posing for photos, some of which they later posted to their social media accounts. 

Cover girls: Bella and Hailey joined BFF and fellow model Kendall Jenner, 20, as the trip helped Kylie Jenner celebrate her 19th birthday in the beautiful Caribbean destination

Cover girls: Bella and Hailey joined BFF and fellow model Kendall Jenner, 20, as the trip helped Kylie Jenner celebrate her 19th birthday in the beautiful Caribbean destination

Fit: Bella and Kendall  jogged barefoot across the beach sporting Aviator shades

Fit: Bella and Kendall jogged barefoot across the beach sporting Aviator shades

Cool girl: Hailey was a cut above in her mint green bikini that featured bold straps and cut outs

Cool girl: Hailey was a cut above in her mint green bikini that featured bold straps and cut outs

Freshening up: A pal helped spray the salty sea water off the beautiful blonde

Freshening up: A pal helped spray the salty sea water off the beautiful blonde

No butts about it: Hailey flashed her delectable derriere as she climbed up to join her gal pals who were sunbathing on deck

No butts about it: Hailey flashed her delectable derriere as she climbed up to join her gal pals who were sunbathing on deck

'At your service' Bella shared this snap of her pouring out drinks

'At your service' Bella shared this snap of her pouring out drinks

'Love you' she wrote as she held hands with bestie Lauren Perez

'Love you' she wrote as she held hands with bestie Lauren Perez

 

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