The 32-year-old underwear model was seen sporting a nautical striped bikini as she headed out to sea off the Italian island of Ischia with her boyfriend Thom Evans yesterday.
Kelly showed off her curves in the pale blue and white two-piece which boasted pale pink straps.
Ahoy there! Kelly Brook donned a sailor striped inspired bikini as she enjoyed a boat trip in Italy
The balcony bra top struggled to contain the chest that found her fame while she showed off her shape in a pair of frilly bottoms.
Kelly wore her dark locks lose around her shoulders and shielded her eyes from the sun in a pair of dark sunnies.
She just frilled to be there: Kelly appeared to be enjoying the day in her balcony bra top and frilled bikini bottoms
Hands on: Thom couldn't keep his hands off Kelly throughout the day
Fun in the sun: The pair were seen fooling around jumping in and out of the water
Body beautifuls: Thom had his impressive muscles on display while Kelly showed off her curves
Thom couldn't keep his eyes, or his hands off his beautiful girlfriend and the pair were spied canoodling throughout the day.
Kelly and Thom were certainly in a playful mood and they were seen jumping in and out of the sea together.
Caught cat napping: At one point Kelly surprised a sleeping Thom
Don't mess with this: Kelly was seen throwing up her hands into the air and pretending to punch her man who appeared amused by her antics
Buxom beauty: Kelly and Thom were seen taking a dip in the water
No need for her float: Kelly's large chest would no doubt help her surface should a rogue wave some crashing down on her
But Kelly later got her own back when she surprised Thom, catching him mid cat-nap.
The feisty brunette also appeared to threaten her man with a clenched fist, but it was all in jest.
Cooling off: The couple sat in a rockpool
Fancy a swim? Kelly and Thom spent some time playing in the water
Tender moment: Thom and Kelly were spotted kissing
While Kelly was happy to flaunt her figure on board the boat as she arrived ready for the trip she covered up.
Ahoy there! Kelly Brook looks lovingly at her fiance as they take in a boat trip during their sunny holiday
Bikini body: Kelly's curves filled her retro bikini out nicely
Rock climbing: The couple pulled themselves over the rocks
Retro style: Kelly's bikini featured a bow and frilly bottoms
Sunning themselves: The loved-up couple chatted amongst themselves next to the other passengers of the yacht
Accompanied by Thom, the ex-Big Breakfast presenter kept her famous curves under wraps in a white vest as she boarded the small vessel.
Keeping abreast of the holiday: Kelly was seen wading through the sea
Capturing the moment: Kelly was seen posing for snaps as Thom worked his magic behind the camera
Cover-up: Model Kelly Brook hides her bikini under a white vest as she boards a boat in Ischia Porto, Ischia
Fit: Former rugby player Thom Evans showed off his impressive physique in a pair of Adidas swimming trunks
For her boat trip around the island - located in the Bay Of Naples - Kelly wore the white vest over a blue and white striped bikini and a pair of blue Superga plimsolls.
The previous night, Kelly was a judge at the Campania leg of the Miss Italia finals at the Hotel Delfini as part of the current Ischia Global Fest.
Admiring the view: Kelly and Thom both appeared quite taken with his six-pack
Day trip: Kelly looked like she was looking forward to seeing the sights of Ischia
Smile! Kelly spent half the time posing for photographs as she was obviously in a happy carefree mood
And it appeared Kelly's short-sighted boyfriend Thom was regretting his decision to attend without his contact lenses.
Kelly tweeted a photo of her boyfriend against the backdrop of beauty queens, saying: 'Someone regrets not wearing there (sic) contact lenses.'
Putting on a show: Kelly kissed Thom in front of the paparazzi
Sharing her expertise: On Tuesday night, Kelly was a judge at the Campania leg of the Miss Italian beauty contest
She tweeted: 'Touched down in Naples! Balmy.
'Just chatting with Terry Gilliam at Naples airport while eating Gelato waiting for @ThomEvans11 to arrive from Paris #IschiaGlobalFilmFest.'
Posh dinner: The couple enjoyed the gala dinner before the beauty contest
The Ischia Global Fest started on Saturday following the climax of the Ischia Film Festival.
Ischia, an island west of Capri, is just an hour away from the port of Naples and is renowned for its healing thermal waters.
'Somebody should have worn his contact lenses': Thom was enjoying the Campania leg of the Miss Italia contest - despite not being able to see properly
Well-heeled: Kelly arrived in a striking pair of black heels, before moving them at the gala