Photos: Will and Kate's royal family Prince William, Duke of Cambridge, kisses Prince Louis as they pose next to Princess Charlotte and Prince George in Norfolk in a handout photo taken by Catherine, Duchess of Cambridge, earlier in 2019. Hide Caption 1 of 49

Photos: Will and Kate's royal family Britain's Prince William and Kate, Duchess of Cambridge with their children Prince George, Princess Charlotte Prince Louis as they arrive for Prince Louis' christening service at the Chapel Royal, St James's Palace, London, on Monday, July 9. Hide Caption 2 of 49

Photos: Will and Kate's royal family Britain's Prince William and his wife Catherine, the Duchess of Cambridge, hold their newborn baby son outside a London hospital on Monday, April 23. The boy, whose name was announced several days later as Louis Arthur Charles, is their third child. Hide Caption 3 of 49

Photos: Will and Kate's royal family Prince William holds the hands of his other two children, Prince George and Princess Charlotte, as they visit the hospital to meet their new brother. Hide Caption 4 of 49

Photos: Will and Kate's royal family Will and Kate attend Easter service with Queen Elizabeth II on April 1. Hide Caption 5 of 49

Photos: Will and Kate's royal family Will and Kate attend the Royal Foundation Forum in London with Will's brother, Prince Harry, and Harry's fiancee, American actress Meghan Markle, on Wednesday, February 28. Hide Caption 6 of 49

Photos: Will and Kate's royal family The couple attends the BAFTA Awards in London on Sunday, February 18. Hide Caption 7 of 49

Photos: Will and Kate's royal family During a visit to Norway, Catherine is escorted to dinner by King Harald V of Norway on Thursday, February 1. William is escorted by Norway's Queen Sonja. Hide Caption 8 of 49

Photos: Will and Kate's royal family The image, used for the Duke and Duchess' 2017 Christmas card, shows the couple with their children, Prince George and Princess Charlotte. Hide Caption 9 of 49

Photos: Will and Kate's royal family Paddington Bear dances with Catherine while Prince William looks on during a charity event in London in October 2017. Hide Caption 10 of 49

Photos: Will and Kate's royal family The royal family arrives at the airport in Berlin for a three-day visit in Germany in July 2017. Hide Caption 11 of 49

Photos: Will and Kate's royal family This photo of Charlotte was taken in April 2017 by her mother. Charlotte is fourth in line to the British throne behind her grandfather, Prince Charles; her father, Prince William; and her big brother, Prince George. Hide Caption 12 of 49

Photos: Will and Kate's royal family Charlotte is held by her mother as her family ends an eight-day tour of Canada in October 2016. At left is her brother and her father. Hide Caption 13 of 49

Photos: Will and Kate's royal family The Duke and Duchess of Cambridge released new photos of Prince George to mark his third birthday in July 2016. Here he plays with the family's pet dog, Lupo. Hide Caption 14 of 49

Photos: Will and Kate's royal family Members of the royal family gather on a balcony in June 2016, during celebrations marking the 90th birthday of Queen Elizabeth II. From left are Princess Anne; Camilla, the Duchess of Cornwall; Prince Charles; Catherine, the Duchess of Cambridge; Princess Charlotte; Prince George; Prince William; Prince Harry; Queen Elizabeth II; and Prince Philip. Hide Caption 15 of 49

Photos: Will and Kate's royal family Kensington Palace released four photos of Princess Charlotte ahead of her first birthday in May 2016. Hide Caption 16 of 49

Photos: Will and Kate's royal family US President Barack Obama talks with Prince William as Catherine plays with Prince George in April 2016. The President and his wife were visiting Kensington Palace. Hide Caption 17 of 49

Photos: Will and Kate's royal family Prince George gets a boost from some foam blocks for a special family photo in April 2016. The portrait, featuring the four generations of the House of Windsor, was commissioned by the Royal Mail and would be featured on a series of stamps to commemorate the Queen's 90th birthday. Hide Caption 18 of 49

Photos: Will and Kate's royal family William and Catherine pose with their children during a trip to the French Alps in March 2016. Hide Caption 19 of 49

Photos: Will and Kate's royal family The family poses for a Christmas photo in December 2015. Hide Caption 20 of 49

Photos: Will and Kate's royal family Princess Charlotte plays with a stuffed dog in this photo taken by her mother in November 2015. Hide Caption 21 of 49

Photos: Will and Kate's royal family William and Catherine pose with their children at Charlotte's christening in July 2015. Hide Caption 22 of 49

Photos: Will and Kate's royal family Princess Charlotte is seen with her big brother for the first time in a photo released by Kensington Palace in June 2015. Hide Caption 23 of 49

Photos: Will and Kate's royal family William and Catherine present their newborn daughter as they leave a London hospital in May 2015. Hide Caption 24 of 49

Photos: Will and Kate's royal family In March 2015, William and Catherine visit a center dedicated to community learning in London. Hide Caption 25 of 49

Photos: Will and Kate's royal family The royal family celebrates Prince George's first birthday with a trip to the Natural History Museum in July 2014. Hide Caption 26 of 49

Photos: Will and Kate's royal family The royal family waves to a crowd before boarding a plane in Wellington, New Zealand, in April 2014. They went on a three-week tour of Australia and New Zealand. Hide Caption 27 of 49

Photos: Will and Kate's royal family The royal couple attends the Tusk Conservation Awards at the Royal Society in London in September 2013. Hide Caption 28 of 49

Photos: Will and Kate's royal family William and Catherine start an ultra marathon in Holyhead, Wales, in August 2013. It was Catherine's first public appearance since the birth of Prince George. Hide Caption 29 of 49

Photos: Will and Kate's royal family The couple are pictured with their newborn boy, Prince George, in 2013. The new parents released two family photographs taken by Michael Middleton, Catherine's father. Hide Caption 30 of 49

Photos: Will and Kate's royal family The Duke and Duchess and their newborn son depart St. Mary's Hospital in London in July 2013. Hide Caption 31 of 49

Photos: Will and Kate's royal family In June 2013, William, Catherine and Prince Harry arrive at Westminster Abbey for a celebration marking the 60th anniversary of Queen Elizabeth II's coronation. Hide Caption 32 of 49

Photos: Will and Kate's royal family In April 2013, Harry, Catherine and William make magic on the set used to depict Diagon Alley in the "Harry Potter" films. Hide Caption 33 of 49

Photos: Will and Kate's royal family The couple attends a St. Patrick's Day parade as they visit Aldershot, England, in March 2013. Hide Caption 34 of 49

Photos: Will and Kate's royal family In September 2012, the couple drank coconut milk from a tree that Queen Elizabeth II planted decades ago in the South Pacific nation of Tuvalu. Hide Caption 35 of 49

Photos: Will and Kate's royal family Catherine and William celebrate during cycling events at the Olympic Games in London in August 2012. Hide Caption 36 of 49

Photos: Will and Kate's royal family The Queen, William and Catherine stand on the balcony of Buckingham Palace during the finale of the Queen's Diamond Jubilee celebrations in June 2012. Hide Caption 37 of 49

Photos: Will and Kate's royal family As part of their charity work, the couple attended a "healthy living cookery session" in London in December 2011. Hide Caption 38 of 49

Photos: Will and Kate's royal family The newly married royal couple watches a rodeo demonstration at a government reception in Calgary, Alberta, in July 2011. Hide Caption 39 of 49

Photos: Will and Kate's royal family Catherine shovels soil during a tree-planting ceremony in Ottawa in July 2011. Hide Caption 40 of 49

Photos: Will and Kate's royal family You can feel the love as the happy couple attends a Snowbirds air show during Canada Day celebrations in July 2011. Hide Caption 41 of 49

Photos: Will and Kate's royal family US President Barack Obama and first lady Michelle Obama meet with the royal couple at Buckingham Palace in May 2011. Hide Caption 42 of 49

Photos: Will and Kate's royal family The newlyweds walk hand in hand from Buckingham Palace the day after their wedding in April 2011. Hide Caption 43 of 49

Photos: Will and Kate's royal family After their wedding on April 29, 2011, the couple drove from Buckingham Palace to Clarence House in a vintage Aston Martin. Hide Caption 44 of 49

Photos: Will and Kate's royal family William and Catherine kiss on the balcony of Buckingham Palace after their wedding ceremony in London. Hide Caption 45 of 49

Photos: Will and Kate's royal family The pair returned to their alma mater in St. Andrews, Scotland, in February 2011. They launched a fundraising campaign for a new scholarship. Hide Caption 46 of 49

Photos: Will and Kate's royal family The couple poses for photographers to mark their engagement in November 2010. Catherine received the engagement ring that belonged to William's late mother, Diana. Hide Caption 47 of 49

Photos: Will and Kate's royal family The couple cheers on the English rugby team during the Six Nations Championship match in London in February 2007. Hide Caption 48 of 49