01of 38THE LITTLE PRINCEFox Photos/Hulton Archive/GettySix months after his June 21, 1982, arrival,Prince Williamposes for what would be the first of many snapshots with his mother, Princess Diana, in December at their London royal residence, Kensington Palace.
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THE LITTLE PRINCE
Fox Photos/Hulton Archive/Getty

Six months after his June 21, 1982, arrival,Prince Williamposes for what would be the first of many snapshots with his mother, Princess Diana, in December at their London royal residence, Kensington Palace.
02of 38RUNNING FREEJayne Fincher/Princess Diana Archive/GettyA year later, William smiles brightly for the cameras while roaming the home’s garden on Dec. 14 during his first official photo call. “He has the good fortune not to look like me,” his fatherPrince Charlesonce said.
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RUNNING FREE
Jayne Fincher/Princess Diana Archive/Getty

A year later, William smiles brightly for the cameras while roaming the home’s garden on Dec. 14 during his first official photo call. “He has the good fortune not to look like me,” his fatherPrince Charlesonce said.
03of 38MUMMY’S BOYTim Graham/GettyTwo years old and towheaded, William takes a seat on his mother’s lap for a portrait session in May 1984.
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MUMMY’S BOY
Tim Graham/Getty

Two years old and towheaded, William takes a seat on his mother’s lap for a portrait session in May 1984.
04of 38HORSE PLAYTim Graham/GettyUh-oh, someone’s not happy! The newly minted big brother shows his displeasure at having to share toys – and the spotlight – withPrince Harry(born September 15, 1984) while being photographed in their Kensington Palace playroom in October 1985.
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HORSE PLAY

Uh-oh, someone’s not happy! The newly minted big brother shows his displeasure at having to share toys – and the spotlight – withPrince Harry(born September 15, 1984) while being photographed in their Kensington Palace playroom in October 1985.
05of 38DUTY BOUNDTim Graham/GettyHe’s got his future all figured out! Twenty years before joining the military, William dons the camouflage attire and burgundy beret of the Parachute Regiment during a 1986 summer trip to Highgrove House, the royals' country estate in Gloucestershire.
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DUTY BOUND

He’s got his future all figured out! Twenty years before joining the military, William dons the camouflage attire and burgundy beret of the Parachute Regiment during a 1986 summer trip to Highgrove House, the royals' country estate in Gloucestershire.
06of 38HOLIDAY SALUTETim Graham/GettyAlready beginning to embrace public attention, the dapper prince, 5, greets royal watchers with the “Windsor wave” as he exits Christmas service at St. George’s Chapel in 1987 with cousins Zara and Peter Phillips.
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HOLIDAY SALUTE

Already beginning to embrace public attention, the dapper prince, 5, greets royal watchers with the “Windsor wave” as he exits Christmas service at St. George’s Chapel in 1987 with cousins Zara and Peter Phillips.
07of 38BABY BLUESA.G. Carrick/Diana Memorial Fund/GettyWilliam happily wraps his arms around his mother while sitting for a family portrait to mark dad’s 40th birthday in August 1988. The young prince would come to serve as Diana’s “chief comforter” during her rocky marriage to Charles.
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BABY BLUES
A.G. Carrick/Diana Memorial Fund/Getty

William happily wraps his arms around his mother while sitting for a family portrait to mark dad’s 40th birthday in August 1988. The young prince would come to serve as Diana’s “chief comforter” during her rocky marriage to Charles.
08of 38DOG DAY AFTERNOONAnwar Hussein/GettyLong beforeLupoentered the picture, the 6-year-old shows off his enduring soft spot for animals at the Minchinhampton horse trials in May 1989.
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DOG DAY AFTERNOON
Anwar Hussein/Getty

Long beforeLupoentered the picture, the 6-year-old shows off his enduring soft spot for animals at the Minchinhampton horse trials in May 1989.
09of 38A GRAND RIDEGeorges De Keerle/GettyWhat a view! The prince takes in London from aboard a carriage ride with his mother, brother and great-grandmother, The Queen Mother, on June 16, 1990, during the Trooping the Colour parade, which honors the British army and marks the sovereign’s birthday.
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A GRAND RIDE
Georges De Keerle/Getty

What a view! The prince takes in London from aboard a carriage ride with his mother, brother and great-grandmother, The Queen Mother, on June 16, 1990, during the Trooping the Colour parade, which honors the British army and marks the sovereign’s birthday.
10of 38ON THE WATERFRONTTim Graham/GettyWilliam and Harry join their mother on one of many family excursions: a trip to Canada, where they don waterproof capes for an October 1991 boat tour of Niagara Falls.
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ON THE WATERFRONT

William and Harry join their mother on one of many family excursions: a trip to Canada, where they don waterproof capes for an October 1991 boat tour of Niagara Falls.
11of 38STEER CLEARRex USAHe’s not quite the right height yet, but 10-year-old William proves he’s already got a need for speed, taking a seat behind the wheel at the British Formula 1 Grand Prix in July 1992.
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STEER CLEAR
Rex USA

He’s not quite the right height yet, but 10-year-old William proves he’s already got a need for speed, taking a seat behind the wheel at the British Formula 1 Grand Prix in July 1992.
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SOAKIN' WET
Cassidy and Leigh/Rex USA

13of 38SHOW & TELLTerry Fincher/GettySitting between his estranged parents, 12-year-old William learns how to represent the royal family at events, such as an August 1994 celebratory parade marking Victory over Japan Day. “William is being taught how to behave in public,” royal watcher Brian Hoey said of the young prince.
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SHOW & TELL
Terry Fincher/Getty

Sitting between his estranged parents, 12-year-old William learns how to represent the royal family at events, such as an August 1994 celebratory parade marking Victory over Japan Day. “William is being taught how to behave in public,” royal watcher Brian Hoey said of the young prince.
14of 38SNOW BUNNIESTim Graham/GettySay Swiss cheese! The eldest Windsor plays protector, looking after Harry and Princesses Beatrice and Eugenie while photographers clamor for a photo during a January 1995 family vacation in Klosters, Switzerland.
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SNOW BUNNIES

Say Swiss cheese! The eldest Windsor plays protector, looking after Harry and Princesses Beatrice and Eugenie while photographers clamor for a photo during a January 1995 family vacation in Klosters, Switzerland.
15of 38COMING UP ROSESTim Graham/GettyHow sweet! At 14, the prince gets treated to a bouquet from a member of his admiring public after attending Christmas Day service at Sandringham Church in 1996, the same year British tabloids begin dubbing him “Prince Dreamboat.”
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COMING UP ROSES

How sweet! At 14, the prince gets treated to a bouquet from a member of his admiring public after attending Christmas Day service at Sandringham Church in 1996, the same year British tabloids begin dubbing him “Prince Dreamboat.”
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WILD AT HEART

17of 38CROWD CONTROLKim Stalknecht/AFP/GettyWhile on vacation with his brother and father in Vancouver, Canada, on March 24, 1998, William works the crowd like a pro for his first set of appearances since Diana’s death. “He has some of his mother’s magic with people,” says his uncle Earl Spencer.
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CROWD CONTROL
Kim Stalknecht/AFP/Getty

While on vacation with his brother and father in Vancouver, Canada, on March 24, 1998, William works the crowd like a pro for his first set of appearances since Diana’s death. “He has some of his mother’s magic with people,” says his uncle Earl Spencer.
18of 38BROTHERLY LOVETim Graham/GettyWhile the boys are as different as can be, “William looks after Harry,” a family friend says of the pair, who sport matching sweaters while catching up at Highgrove in July 1999. “[They] have got much closer [since entering Eton College].”
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BROTHERLY LOVE

While the boys are as different as can be, “William looks after Harry,” a family friend says of the pair, who sport matching sweaters while catching up at Highgrove in July 1999. “[They] have got much closer [since entering Eton College].”
19of 38MIND THE GAPGetty(2)After graduating from Eton, William spends his 18th year abroad, traveling to Chile in December 2000 to work on construction projects in the South American town of Tortel. His devotion to giving back is something Diana had hoped to impress upon her sons, saying, “I want them to have an understanding of people’s emotions, of people’s insecurities, of people’s distress, of their hopes and dreams.”
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MIND THE GAP
Getty(2)

After graduating from Eton, William spends his 18th year abroad, traveling to Chile in December 2000 to work on construction projects in the South American town of Tortel. His devotion to giving back is something Diana had hoped to impress upon her sons, saying, “I want them to have an understanding of people’s emotions, of people’s insecurities, of people’s distress, of their hopes and dreams.”
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MEDIA SCHOOLING

In September 2001, William takes a rare moment to speak with the press before beginning his term at Scotland’s St. Andrews University, asking for privacy from the media so that he can blend in with the other students. “It will get easier as time goes on,” he says of the attention. “Everyone will get bored of me.”
21of 38TWO OF A KINDTim Graham/GettyLike father, like son! Twenty-year-old William wraps a loving arm around his father during their annual ski vacation to Switzerland in March 2002. “He’s emerged as a very successful single parent,” says Hoey of Charles.
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TWO OF A KIND

Like father, like son! Twenty-year-old William wraps a loving arm around his father during their annual ski vacation to Switzerland in March 2002. “He’s emerged as a very successful single parent,” says Hoey of Charles.
22of 38LINE DRIVEAnwar Hussein/GettyIn May 2003, William makes time for some fun while at St. Andrews, where he studies art history and geography and begins dating future wifeKate Middleton. “I’m not a party animal, despite what some people might think,” he says. “But I like to go out sometimes like anyone else.”
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LINE DRIVE

In May 2003, William makes time for some fun while at St. Andrews, where he studies art history and geography and begins dating future wifeKate Middleton. “I’m not a party animal, despite what some people might think,” he says. “But I like to go out sometimes like anyone else.”
23of 38GUEST OF HONORMike Marsland/WireimageHope he didn’t upstage the groom! The prince cuts a fine figure at the wedding of childhood friend Edward van Cutsem – who would laterreturn the favor– and Lady Tamara Grosvenor on November 6, 2004, at Chester Cathedral.
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GUEST OF HONOR
Mike Marsland/Wireimage

Hope he didn’t upstage the groom! The prince cuts a fine figure at the wedding of childhood friend Edward van Cutsem – who would laterreturn the favor– and Lady Tamara Grosvenor on November 6, 2004, at Chester Cathedral.
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ALWAYS GAME
Dean Treml/Getty

25of 38AT EASE, SOLDIERAlpha /LandovWilliam can’t help but crack a smile as his grandmother,Queen ElizabethII, inspects him and hisfellow graduatesfrom the Royal Military Academy in Sandhurst, England, on December 15, 2006. His completion makes him a member of the Household Cavalry’s Blues and Royals.
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AT EASE, SOLDIER
Alpha /Landov

William can’t help but crack a smile as his grandmother,Queen ElizabethII, inspects him and hisfellow graduatesfrom the Royal Military Academy in Sandhurst, England, on December 15, 2006. His completion makes him a member of the Household Cavalry’s Blues and Royals.
26of 38RIDING THE WAVEGettyThe boys get into the groove at the July 1, 2007,Concert for Diana, a special celebration of their late mother’s life on the 10th anniversary of her death and what would have been her 46th birthday. “This evening is about all that our mother loved in life – her music, her dance, her charities and her family and friends,” William says to the crowd at London’s Wembley Arena.
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RIDING THE WAVE
Getty

The boys get into the groove at the July 1, 2007,Concert for Diana, a special celebration of their late mother’s life on the 10th anniversary of her death and what would have been her 46th birthday. “This evening is about all that our mother loved in life – her music, her dance, her charities and her family and friends,” William says to the crowd at London’s Wembley Arena.
27of 38SPORTING GOOD TIMEAnwar Hussein/WireimageWilliam teaches one lucky pint-size pal about fandemonium when he visits St. Aidan’s Primary School in Blackburn, England, on May 9, 2008, as part of his duties as president of the English Football Association.
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SPORTING GOOD TIME
Anwar Hussein/Wireimage

William teaches one lucky pint-size pal about fandemonium when he visits St. Aidan’s Primary School in Blackburn, England, on May 9, 2008, as part of his duties as president of the English Football Association.
28of 38BAND OF BROTHERSPaul Ellis/AFP/Getty ImagesTogether again, the princes sync up for a photo call atRoyal Air Force Shawbury, home of the Defence Helicopter Flying School, where William trains to become a Royal Air Force search-and-rescue pilot and Harry prepares to join the Army Air Corps.
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BAND OF BROTHERS
Paul Ellis/AFP/Getty Images

Together again, the princes sync up for a photo call atRoyal Air Force Shawbury, home of the Defence Helicopter Flying School, where William trains to become a Royal Air Force search-and-rescue pilot and Harry prepares to join the Army Air Corps.
29of 38BAT MANIndigo/GettyAt the ready! William swaps his military uniform for that of a cricketer, playing in a friendly game on behalf of the King’s Head Inn on July 17, 2010, in Chipping Norton, England.
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BAT MAN
Indigo/Getty

At the ready! William swaps his military uniform for that of a cricketer, playing in a friendly game on behalf of the King’s Head Inn on July 17, 2010, in Chipping Norton, England.
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OFF THE MARKET

After nearly nine years together, WilliamwedsMiddleton – now known as the Duchess of Cambridge – on April 29, 2011, at Westminster Abbey, from which the couple emerges as man and wife.
31of 38HITTING HIS STRIDEDanny Martindale/Filmmagic)With ayear of marriageunder his belt and his search-and-rescue trainingprogressing, the prince enters his third decade exuding confidence at an appearance for the Queen’sDiamond Jubileecelebrations in Nottingham, England, on June 13.
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HITTING HIS STRIDE
Danny Martindale/Filmmagic)

With ayear of marriageunder his belt and his search-and-rescue trainingprogressing, the prince enters his third decade exuding confidence at an appearance for the Queen’sDiamond Jubileecelebrations in Nottingham, England, on June 13.
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BY GEORGE!
Samir Hussein/Wireimage

33of 38DOWN UNDERAnthony Phelps/Reuters/LandovNine months later, William and Kate set off for a royal tour of Australia and New Zealand. Making the trip all the sweeter,Prince Georgetags along – just like William did with his parents when he was George’s age.
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DOWN UNDER
Anthony Phelps/Reuters/Landov

Nine months later, William and Kate set off for a royal tour of Australia and New Zealand. Making the trip all the sweeter,Prince Georgetags along – just like William did with his parents when he was George’s age.
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THREE BECOMES FOUR
Geoff Pugh/Rex

35of 38FAMILY VACATIONJohn Stillwell/WPA Pool/Getty ImagesWill, Kate, George and Charlotte have had quite the year as a family of four – including a snow-filled trip to the French Alps. He’ll also start off his 34th year away from home, in the French city of Saint Etienne, where he’s watching a soccer match between England and Slovakia. He’ll head home that morning to celebrate “privately.”
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FAMILY VACATION
John Stillwell/WPA Pool/Getty Images

Will, Kate, George and Charlotte have had quite the year as a family of four – including a snow-filled trip to the French Alps. He’ll also start off his 34th year away from home, in the French city of Saint Etienne, where he’s watching a soccer match between England and Slovakia. He’ll head home that morning to celebrate “privately.”
36of 38GETTING CANDIDChris Jackson/GettyWilliam’s 35th year saw him open up about being a parent, the early loss of his mother and more, particularly, in support of Heads Together, the mental health initiative he heads up along withPrincess KateandPrince Harry. It was also his last as an air ambulance pilot. He also retired from the job and transitioned to full-time royal status later in the year.
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GETTING CANDID
Chris Jackson/Getty

William’s 35th year saw him open up about being a parent, the early loss of his mother and more, particularly, in support of Heads Together, the mental health initiative he heads up along withPrincess KateandPrince Harry. It was also his last as an air ambulance pilot. He also retired from the job and transitioned to full-time royal status later in the year.
37of 38WELCOME LOUIS!Samir Hussein/WireImageWilliam and Kate welcomed their third child,Prince Louis, during the royal dad’s 36th year. The royal family also celebrated the royal wedding ofPrince HarryandMeghan Markle.
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WELCOME LOUIS!
Samir Hussein/WireImage

William and Kate welcomed their third child,Prince Louis, during the royal dad’s 36th year. The royal family also celebrated the royal wedding ofPrince HarryandMeghan Markle.
38of 38FAMILY OF FIVEPrince Louis, Prince William, Kate Middleton, Prince George and Princess Charlotte.Tim Rooke/ShutterstockWith Louis' debut, the Cambridges made their first Trooping the Colour appearance as a family of five!
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FAMILY OF FIVE
Prince Louis, Prince William, Kate Middleton, Prince George and Princess Charlotte.Tim Rooke/Shutterstock

With Louis' debut, the Cambridges made their first Trooping the Colour appearance as a family of five!
source: people.com