Inside Mustique, Prince William and Kate Middleton's celeb-favorite Caribbean vacation spot

The Duke and Duchess of Cambridge are vacationing on a private Caribbean island, but thanks to social media, we're able to take a peek inside.

This is Prince William and Kate Middleton's latest of many visits to Mustique, which is located within a chain of islands in the West Indies. It's been a favorite spot of royals for decades: Princess Margaret was one of the first people to begin frequenting the beautiful, then minimally-developed spot in the early 1960s. As it began to flourish as a destination for the extremely wealthy, Queen Elizabeth II and the Duke of Edinburgh were known to visit in the mid-20th century.

"There are no rules on Mustique, no protocols or expectations," the island's official website reads. "Guests can simply do as they wish."

PHOTOS: Inside the ultra-private island of Mustique

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Caribbean island of Mustique
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Caribbean island of Mustique
Cool off with a view over Macaroni Beach at the White Cedars Villa. #mustique #mustbemustique
There are endless views from every angle at the @greystonemustique 🌴#mustique #mustbemustique
The water is always crystal clear on Mustique. 📸 @jjlr #mustique #mustbemustique
Sunsets on #mustiqueisland - that moment to reflect on another glorious day and the evening that’s about to start! #mustique #mustiquemoments
Life is spectacular at the Sienna Villa. 🌴 📸 @alexamengual #mustique #mustbemustique
Wave searching on Gelliceaux Beach... 🌴 📸 @robstrok #mustique #mustbemustique
A classic moment on Mustique... 📸 #slimaarons ✨#mustique #mustbemustique
Designed for a rock legend, the extraordinary Mandalay Villa eclectically blends ornate Balinese style with essential modern elements and Caribbean charm, providing guests with the ultimate in hedonistic escapism. ✨#mustique #mustbemustique
Seeking out the shade...🌴 📸 by guest @angela_deen #mustique #mustbemustique
Sunday lunching at the one and only @basilsbarmustique ✨ #regram @viaggiatoridelmondo #mustique #mustbemustique
Our favourite way to spend sunny mornings on Mustique! ✨ The ultimate #tbt courtesy of #slimaarons 🌴 #mustique #mustbemustique
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The island's no-fly policy is a big privacy feature for not only the royals, but also a handful of major celebrities who've vacationed in Mustique over the years. Paul McCartney, Jon Bon Jovi, Denzel Washington, David Bowie and Mick Jagger are among those names. 

Even though the island is incredibly expensive and boasts remarkable privacy, its social media team does share enviable photos to Instagram. The snapshots don't, of course, feature the recognizable faces who like to visit. A tight security list ensures that nobody unapproved makes it onto the land.

While the Duke and Duchess are visiting on holiday, there is some minor royal work element to the trip: Prince William is technically second-in-line to its throne.

You can read more history of the island, and see vintage photos, here on Mustique's official website.

PHOTOS: Kate, Will and their three children in 2019

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Royal family at Trooping the Colour
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Royal family at Trooping the Colour
LONDON, ENGLAND - JUNE 08: Prince Louis, Prince George, Prince William, Duke of Cambridge, Princess Charlotte and Catherine, Duchess of Cambridge appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Queen Elizabeth II and Prince Andrew, Duke of York appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex ride by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Louis, Prince George, Prince William, Duke of Cambridge, Princess Charlotte and Catherine, Duchess of Cambridge appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Louis, Prince George, Prince William, Duke of Cambridge, Princess Charlotte and Catherine, Duchess of Cambridge appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Louis, Prince George, Prince William, Duke of Cambridge, Princess Charlotte and Catherine, Duchess of Cambridge appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Charles, Prince of Wales, Queen Elizabeth II appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Camilla, Duchess of Cornwall, Prince Charles, Prince of Wales, Queen Elizabeth II and Prince Andrew, Duke of York appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, UNITED KINGDOM - JUNE 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge and Princess Charlotte of Cambridge watch a flypast from the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, although the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - JUNE 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge watch a flypast from the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, although the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - JUNE 08: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex ride by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, UNITED KINGDOM - JUNE 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge and Princess Charlotte of Cambridge watch a flypast from the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, although the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - 2019/06/08: Britain's Queen Elizabeth II is seen in a carriage on her way to Buckingham Palace after the Trooping the Colour ceremony, which marks her 93rd birthday. (Photo by Dinendra Haria/SOPA Images/LightRocket via Getty Images)
LONDON, UNITED KINGDOM - 2019/06/08: Catherine Duchess of Cambridge (R) and Meghan Duchess of Sussex (L) are seen in a carriage on their way to the Horse Guards Parade during the Trooping the Colour ceremony, which marks the 93rd birthday of Queen Elizabeth II, Britain's longest reigning monarch. (Photo by Dinendra Haria/SOPA Images/LightRocket via Getty Images)
LONDON, UNITED KINGDOM - JUNE 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge, Prince Louis of Cambridge and Camilla, Duchess of Cornwall on the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, although the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - 2019/06/08: Meghan Duchess of Sussex and Prince Harry are seen in a carriage on their way to Buckingham Palace after attending the Trooping the Colour ceremony, which marks the 93rd birthday of, Queen Elizabeth II, Britain's longest reigning monarch. (Photo by Dinendra Haria/SOPA Images/LightRocket via Getty Images)
LONDON, ENGLAND - JUNE 08: Catherine, Duchess of Cambridge rides by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Lady Louise Windsor rides by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Edward, Earl of Wessex rides by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Camilla, Duchess of Cornwall, Prince Charles, Prince of Wales, Queen Elizabeth II, Prince William, Duke of Cambridge and Prince Andrew, Duke of York seen on the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Camilla, Duchess of Cornwall, Prince Charles, Prince of Wales, Queen Elizabeth II, Prince William, Duke of Cambridge and Prince Andrew, Duke of York seen on the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Prince Edward, Earl of Wessex, Camilla, Duchess of Cornwall, Catherine, Duchess of Cambridge, Autumn Phillips, Peter Phillips, Savannah Phillips and Isla Phillips seen on the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Prince George, Princess Charlotte, Prince William, Duke of Cambridge, Prince Louis and Catherine, Duchess of Cambridge seen on the balcony of Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Princess Eugenie Windsor and Jack Brooksbank during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - JUNE 08: Princess Beatrice Windsor and Jack Brooksbank during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - JUNE 08: Meghan, Duchess of Sussex rides by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: (L-R) Lady Louise Windsor, Sophie, Countess of Wessex, James Viscount Severn and Prince Edward, Earl of Wessex during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - JUNE 08: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Louis of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - JUNE 08: Princess Beatrice of York and Princess Eugenie of York leave Buckingham Palace in a carriage during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Meghan, Duchess of Sussex rides by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex ride by carriage down the Mall during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Charles and Camilla, Duchess of Cornwall arrive to Buckingham Palace during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex arrive to Buckingham Palace in a carriage during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, ENGLAND - JUNE 08: Meghan, Duchess of Sussex, Prince Harry, Duke of Sussex and Catherine, Duchess of Cambridge leave Buckingham Palace in a carriage during Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. (Photo by James Devaney/Getty Images)
LONDON, UNITED KINGDOM - JUNE 08: Autumn Phillips, Peter Phillips and their children Savannah Phillips and Isla Phillips stand on the balcony of Buckingham Palace following Trooping the Colour on June 08, 2019 in London, England. (Photo by Anwar Hussein/WireImage)
LONDON, UNITED KINGDOM - JUNE 08: Autumn Phillips, Peter Phillips and their children Savannah Phillips and Isla Phillips stand on the balcony of Buckingham Palace following Trooping the Colour on June 08, 2019 in London, England. (Photo by Anwar Hussein/WireImage)
LONDON, UNITED KINGDOM - JUNE 08: Camilla, Duchess of Cornwall and Catherine, Duchess of Cambridge ride in an open carriage as they attend Trooping the Colour on June 08, 2019 in London, England. (Photo by Anwar Hussein/WireImage)
LONDON, UNITED KINGDOM - JUNE 08: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Louis of Cambridge and Princess Charlotte of Cambridge wave from a window of Buckingham Palace as they attend Trooping The Colour, the Queen's annual birthday parade, on June 8, 2019 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, although the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - JUNE 08: Lady Louise Windsor attends Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JUNE 08: Prince Charles, Prince of Wales, Queen Elizabeth II and Prince Andrew, Duke of York appear on the balcony during Trooping The Colour, the Queen's annual birthday parade, on June 08, 2019 in London, England. (Photo by Karwai Tang/WireImage)
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