01of 11A PICNIC IN THE PARKTim Graham/APAt just 10 months old,Williamhad the full attention of his adoring mother (here, on a trip to New Zealand in 1983). Of learning that her firstborn was to be a boy, Diana told the BBC in a 1995 interview that it was an “enormous relief.”

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A PICNIC IN THE PARK

Tim Graham/AP

A PICNIC IN THE PARK

At just 10 months old,Williamhad the full attention of his adoring mother (here, on a trip to New Zealand in 1983). Of learning that her firstborn was to be a boy, Diana told the BBC in a 1995 interview that it was an “enormous relief.”

02of 11HEIR AND HEIR ALIKETim Graham/APDiana helped her matching towheaded sons William, 4, andHarry, nearly 2, navigate a safe landing at the Aberdeen Airport, where the family headed for a summer vacation in 1986. “It would have been a little tricky if it had been two girls,” Diana told the BBC. “William’s future being as it is, and Harry like a form of a back-up in that aspect.”

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HEIR AND HEIR ALIKE

HEIR AND HEIR ALIKE

Diana helped her matching towheaded sons William, 4, andHarry, nearly 2, navigate a safe landing at the Aberdeen Airport, where the family headed for a summer vacation in 1986. “It would have been a little tricky if it had been two girls,” Diana told the BBC. “William’s future being as it is, and Harry like a form of a back-up in that aspect.”

03of 11BIRTHDAY HIGH JINKSGlobeAt the annual Trooping the Colour ceremony in 1988, which marksQueen Elizabeth’s official birthday (June 11), William, 5, smiled at the crowd while 3-year-old Harry stuck out his tongue – to mom Diana’s chagrin – at the fans surrounding Buckingham Palace.

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BIRTHDAY HIGH JINKS

Globe

BIRTHDAY HIGH JINKS

At the annual Trooping the Colour ceremony in 1988, which marksQueen Elizabeth’s official birthday (June 11), William, 5, smiled at the crowd while 3-year-old Harry stuck out his tongue – to mom Diana’s chagrin – at the fans surrounding Buckingham Palace.

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HARRY’S FIRST DAY

THINGS ARE LOOKING UP

05of 11LIFE’S A BEACHRex USAIt was a sandy pile-up for Diana as she got in on the fun with Wills, 7, and Harry, 5, and her nephews during a 1990 New Year’s getaway with her mother, Frances Shand-Kydd, on Necker Island, Sir Richard Branson’s private hideaway in the British Virgin Islands.

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LIFE’S A BEACH

Rex USA

LIFE’S A BEACH

It was a sandy pile-up for Diana as she got in on the fun with Wills, 7, and Harry, 5, and her nephews during a 1990 New Year’s getaway with her mother, Frances Shand-Kydd, on Necker Island, Sir Richard Branson’s private hideaway in the British Virgin Islands.

06of 11NORTH COUNTRYMirrorpix/Everett CollectionDuring the Waleses' trip to Canada in October 1991, Diana made time between touring an AIDS hospice and a women’s shelter to join William, 9, and Harry, 7, on a visit to Niagara Falls, where the trio donned rain slickers for a wet and wild voyage on the Maid of the Mist.

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NORTH COUNTRY

Mirrorpix/Everett Collection

NORTH COUNTRY

During the Waleses' trip to Canada in October 1991, Diana made time between touring an AIDS hospice and a women’s shelter to join William, 9, and Harry, 7, on a visit to Niagara Falls, where the trio donned rain slickers for a wet and wild voyage on the Maid of the Mist.

07of 11A REGAL CARRIAGETim Graham/APWith nanny Olga Powell and mom Diana, the young princes enjoyed an open-sleigh ride in Lech, Austria, on March 30, 1993.

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A REGAL CARRIAGE

A REGAL CARRIAGE

With nanny Olga Powell and mom Diana, the young princes enjoyed an open-sleigh ride in Lech, Austria, on March 30, 1993.

08of 11LET IT SNOWMartin Keene/AFP/GettyIn March of the following year, during their pre-Easter break, William, 11, and Harry, 9, returned to the slopes in Lech, Austria, with Mom for a week-long ski trip that had become an annual family tradition.

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LET IT SNOW

Martin Keene/AFP/Getty

LET IT SNOW

In March of the following year, during their pre-Easter break, William, 11, and Harry, 9, returned to the slopes in Lech, Austria, with Mom for a week-long ski trip that had become an annual family tradition.

09of 11SPLASH MOUNTAINCassidy and Leigh/Rex USAAlways making sure her boys balanced their royal duties with play, Diana had pre-teens Harry and William bracing themselves for a thrilling – and wet! – day at Britain’s most popular amusement park, Thorpe Park, in 1993.

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SPLASH MOUNTAIN

Cassidy and Leigh/Rex USA

SPLASH MOUNTAIN

Always making sure her boys balanced their royal duties with play, Diana had pre-teens Harry and William bracing themselves for a thrilling – and wet! – day at Britain’s most popular amusement park, Thorpe Park, in 1993.

10of 11A MOTHER’S PRIDEAPWith Harry, 10, looking on, Diana gave William, 13, pointers as he signed the traditional entrance book at Eton College on his first day, Sept. 6, 1995. The school was another break with royal tradition: The young prince enrolled at the venerable institution instead of the private boarding school Gordonstoun, an alma mater of his fatherPrince Charlesand grandfatherPrince Philip.

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A MOTHER’S PRIDE

AP

A MOTHER’S PRIDE

With Harry, 10, looking on, Diana gave William, 13, pointers as he signed the traditional entrance book at Eton College on his first day, Sept. 6, 1995. The school was another break with royal tradition: The young prince enrolled at the venerable institution instead of the private boarding school Gordonstoun, an alma mater of his fatherPrince Charlesand grandfatherPrince Philip.

11of 11A SUMMER TO REMEMBERLionel Cironneau/APA year after her divorce (and a month-and-a-half before her sudden death), a carefree Diana spent a few idyllic days in July 1997 vacationing with Harry, 12, and William, 15 (not pictured), in Saint-Tropez – at the invitation of her new love interest Dodi Fayed’s father.

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A SUMMER TO REMEMBER

Lionel Cironneau/AP

A SUMMER TO REMEMBER

A year after her divorce (and a month-and-a-half before her sudden death), a carefree Diana spent a few idyllic days in July 1997 vacationing with Harry, 12, and William, 15 (not pictured), in Saint-Tropez – at the invitation of her new love interest Dodi Fayed’s father.

source: people.com