The couple initially met at school and even shared a house with others while students. Here they are on the day of their graduation ceremony at St. Andrew's University on June 23, 2005, in Scotland.
Kate Middleton received the engagement ring that belonged to Prince William's late mother, Diana, Princess of Wales. The couple posed for photographers to mark their engagement in the State Rooms of St. James' Palace, central London, on November 16, 2010.
Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge kiss on the balcony at Buckingham Palace after their wedding ceremony on April 29, 2011, in London.
The newly married royal couple enjoyed their first joint overseas tour in July 2011. Here the pair watch a rodeo demonstration at a government reception in Calgary, Alberta.
As part of their charity work, the couple attended a "healthy living cookery session" during a visit to Centrepoint's Camberwell Foyer on December 21, 2011, in London. The national charity provides housing and support to improve the lives of homeless young people.
During their visit to Canada, Catherine shovels soil as Prince William looks on in July 2011 during a tree-planting ceremony in Ottawa.
You can feel the love as the happy couple attend a Snowbirds air show during Canada Day celebrations in July 2011 in Ottawa.
U.S. President Barack Obama and first lady Michelle Obama meet with the royal couple at Buckingham Palace in May 2011 in London.
The pair passed St. Salvator's halls, accompanied by chancellor Sir Menzies Campbell, right, during a visit to the University of St. Andrews in February 2011. They returned to the their alma mater launch a fundraising campaign for a new scholarship.
After their wedding in April 2011, the duke and duchess drive from Buckingham Palace to Clarence House in a vintage Aston Martin.
The newlyweds walk hand in hand from Buckingham Palace the day after their wedding to a waiting helicopter as they leave for a secret honeymoon location on April 30, 2011.
Queen Elizabeth II, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, on the balcony of Buckingham Palace during the finale of the Queen's Diamond Jubilee celebrations on June 5, 2012, in London.
Catherine and Prince William celebrate during track cycling events at the 2012 Olympic Games in London.
The pair cheered on the English rugby team during the RBS Six Nations Championship match between England and Italy at Twickenham in February 2007 in London.
In September 2012, the couple drank coconut milk from a tree planted 30 years before by Queen Elizabeth II in the South Pacific island nation of Tuvalu.
The couple attended a St. Patrick's Day parade by the 1st Battalion Irish Guards as they visit Aldershot Barracks in March 2013 in Aldershot, England.
Prince Harry and the royal couple make magic on the set used to depict Diagon Alley in the Harry Potter films during the inauguration of Warner Bros. Studios Leavesden in London in April 2013.
Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry arrive for a service of celebration last month marking the 60th anniversary of the coronation of Elizabeth II, at Westminster Abbey in London.
From the announcement of their engagement in 2010 to the eager awaiting of the birth of the royal baby in 2013, the love affair between Prince William and the former Kate Middleton has enthralled millions.
The couple initially met at school and even shared a house with others while students. Here they are on the day of their graduation ceremony at St. Andrew's University on June 23, 2005, in Scotland.
Kate Middleton received the engagement ring that belonged to Prince William's late mother, Diana, Princess of Wales. The couple posed for photographers to mark their engagement in the State Rooms of St. James' Palace, central London, on November 16, 2010.
Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge kiss on the balcony at Buckingham Palace after their wedding ceremony on April 29, 2011, in London.
The newly married royal couple enjoyed their first joint overseas tour in July 2011. Here the pair watch a rodeo demonstration at a government reception in Calgary, Alberta.
As part of their charity work, the couple attended a "healthy living cookery session" during a visit to Centrepoint's Camberwell Foyer on December 21, 2011, in London. The national charity provides housing and support to improve the lives of homeless young people.
During their visit to Canada, Catherine shovels soil as Prince William looks on in July 2011 during a tree-planting ceremony in Ottawa.
You can feel the love as the happy couple attend a Snowbirds air show during Canada Day celebrations in July 2011 in Ottawa.
U.S. President Barack Obama and first lady Michelle Obama meet with the royal couple at Buckingham Palace in May 2011 in London.
The pair passed St. Salvator's halls, accompanied by chancellor Sir Menzies Campbell, right, during a visit to the University of St. Andrews in February 2011. They returned to the their alma mater launch a fundraising campaign for a new scholarship.
After their wedding in April 2011, the duke and duchess drive from Buckingham Palace to Clarence House in a vintage Aston Martin.
The newlyweds walk hand in hand from Buckingham Palace the day after their wedding to a waiting helicopter as they leave for a secret honeymoon location on April 30, 2011.
Queen Elizabeth II, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, on the balcony of Buckingham Palace during the finale of the Queen's Diamond Jubilee celebrations on June 5, 2012, in London.
Catherine and Prince William celebrate during track cycling events at the 2012 Olympic Games in London.
The pair cheered on the English rugby team during the RBS Six Nations Championship match between England and Italy at Twickenham in February 2007 in London.
In September 2012, the couple drank coconut milk from a tree planted 30 years before by Queen Elizabeth II in the South Pacific island nation of Tuvalu.
The couple attended a St. Patrick's Day parade by the 1st Battalion Irish Guards as they visit Aldershot Barracks in March 2013 in Aldershot, England.
Prince Harry and the royal couple make magic on the set used to depict Diagon Alley in the Harry Potter films during the inauguration of Warner Bros. Studios Leavesden in London in April 2013.
Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry arrive for a service of celebration last month marking the 60th anniversary of the coronation of Elizabeth II, at Westminster Abbey in London.
