William larks around on a boat in Ibiza with Kate Middleton and the Middleton clan in never-before-seen pictures

They were carefree days before the world became entranced by their every movement.

This is Kate Middleton and her sister Pippa as they’ve never been seen before, enjoying an exuberant holiday in Ibiza with their family and Prince William.

Taken in 2006, these previously unseen pictures capture a fleeting moment in the lives of the couple when they could behave like ordinary twentysomethings, unencumbered by the responsibilities they now carry as the new stars of the Royal Family.

Athletic in Ibiza, Pippa Middleton performs a flawless backflip in to the warm waters of the Mediterranean as an admiring Kate looks on from the stern of the motor yacht

Playful: Pippa Middleton climbs back aboard as William jokingly grabs Kate; right, the sisters relax on deck, with Kate using her camera

Sunshine days: William, in red shorts, with Pippa Middleton (left), Carole, in green bikini, and other holiday guests

They show the Prince larking around with Kate and Pippa, the girls’ mother Carole and their brother James on a boat belonging to Carole’s brother Gary Goldsmith during a week-long sunshine holiday to Ibiza.

Pippa shows off her athletic prowess -- and her enviably toned physique -- performing a backwards dive into the sea.

Heir in the air, Watched by Carole, Kate, James (in the patterned shorts) and Pippa, William attempts a backflip from the boat...

... but the young royal finishes with an ungainly belly-flop into the water

Making waves, The Prince failed to match Pippa’s graceful aquatic display

Her Royal Hotness: Pippa Middleton in her bridesmaid’s dress at her sister’s wedding

Carole, who won admiration at the wedding for her elegant appearance, also reveals a youthfully trim figure in an emerald green bikini.

Meanwhile, in his red swimming shorts, William could be any young man eager to impress his girlfriend by performing a backflip -- which somehow turns into a belly-flop by the time he hits the water.

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The pictures reveal the extent to which the Middletons invited William into the heart of their family.

During their week in Ibiza, they stayed at Gary’s £5million villa, dubbed ’La Maison de Bang Bang’.

Gary, a multi-millionaire property developer, later became the black sheep of the family after he was caught offering drugs to an undercover reporter.

But back in 2006, the public scrutiny the Middletons would later experience had not yet truly begun.

It was a year after William and Kate had graduated from St Andrews University, and William had just begun his military training at Sandhurst.

At just 24, neither of them had any idea what the future would hold and were simply enjoying their time together.

The following year, Kate and William split for a period, and when they reunited there was a sense of inevitability that they would eventually marry.

Sylvester Stallone outpuffs chain-smoking Kate Moss with his giant

Kate Moss and unlikely new friend Sylvester Stallone bonded over their love of nicotine in Ibiza yesterday. The famous pair chain-smoked their way through lunch at a beachside cafe on the Balearic island, where both are holidaying with mutual friend, retail tycoon Sir Philip Green. After touring the Balearics with her family, Kate reunited with Sir Philip - who she was spotted dining with last week - who is now hosting Sly and his large family.

Chain-smoking Kate Moss and Sylvester Stallone chat and smoke over lunch in a beachside cafe in Ibiza

As Kate puffed away on her trusty marlboros, Sly opted for a fat cigar. Over the weekend, the supermodel was photographed with two cigarettes on the go as she enjoyed a nicotine session with a group of hunky pals over the weekend.

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Despite having one nicotine stick in her mouth, the 34-year-old had a second cigarette poised for puffing. Kate is holidaying with her mother Linda and seven-year-old daughter Lila Grace and a group of male pals on a yacht moored off the island of Formentera.

Kate Moss has not been short of admirers as she soaks up the sun on the Spanish island of Formentera

Kate Moss has a second cigarette ready for her smoking session

Her on/off boyfriend Jamie Hince remains a notable absence after recent rumours of a split. Kate herself was the image of boho beach-chic sporting statement earrings with a printed sundress over her bikini. Later she changed into a floaty kaftan. The group were kept entertained as they soaked up the sun with a continuous supply of cigarettes and alcohol.

Even Kate's well-chosen wardrobe isn't failsafe

Kate gets a hand as she joins the boat party

The break on the Spanish island, which is a stone's throw from Ibiza, follows a break in the party hotspot with friend and colleague Sir Philip, where Kate was seen enjoying dinner with the Topshop tycoon and his daughter. It appears to have been one long holiday for Moss, who preceded her Spanish break with a holiday aboard a $20 million yacht in Sardinia. It is thought that the break with best friend Davinia Taylor and her husband Dave, was to take the model's mind off her troubles with Kills rocker Hince.

Kate Moss and pals enjoy a humourous moment

the group were well-stocked with cigarettes and alcohol

The couple's on-off status has been especially rocky of late following a break-up in early July. The pair appeared to have rekindled their romance last week, when they were spotted hand-in-hand during a shopping trip to Selfridges.

Kate Moss and her mother Linda pose with friends for Moss's four-year-old daughter Lila Grace

Kate shows off her holiday tan while wading ashore in biza

Leonardo DiCaprio soaks up attention from mystery blonde... as his girlfriend holidays without him

Leonardo Di Caprio has been soaking up the sun on his luxury yacht - but his stunning model girlfriend was no where to be seen. Instead a pretty blonde was snapped keeping the Titanic hunk company while he enjoyed a break off the coast of Ibiza together with a group of male friends.

Leonardo Di Caprio relaxed with his glamourous guest aboard his luxury holiday yacht

A shirtless Leonardo was spotted lounging around his vessel - smoking cigarettes and taking in the sight with his binoculars. Meanwhile his beautiful Israeli girlfriend Bar Refaeli has been enjoying her own holiday - basking in the sun in the South of France and Spain with a female friend.

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The mystery blonde enjoys the sun aboard Leonardo's luxury yacht

Leonardo, 33, is tipped to be involved in a remake of the hit sci-fi TV series The Twilight Zone.The actor and his production company are said to be looking for pitches and script ideas for a feature-length movie.

Leonardo soaks up the sun while enjoying time on the water with friends

The Twilight Zone was apparently Di Caprio's favourite TV show, but it is not yet known if he will star in the new adaptation. The show spanned more than 150 episodes in the US between 1959 and 1964 - with each story set around ordinary people in extraordinary circumstances, with a sci-fi twist.

Bar parties in Marbella after holidaying in St Tropez

His on/off girlfiend Bar was spotted enjoying St Tropez's scorching beaches with a girlfriend.And within a few days was seen partying at at an exclusive event held by jewellers, Chopard in Marbella, Spain.

Leonardo was no where to be seen when Bar holidayed in St Tropez earlier this week