Photos of the Duke and Duchess of Cambridge and their children, Prince George and Princess Charlotte Elizabeth Diana, through the years.
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart after talking to locals about mountain bikes on Montana mountain near Carcross during the Royal Tour of Canada on Sept. 28, 2016 in Carcross, Canada. (Credit: Getty Images / Pool)
Britain's Catherine, Duchess of Cambridge, and Princess Charlotte
Britain's Catherine, Duchess of Cambridge, and Princess Charlotte watch a man inflate a balloon at a children's party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: AP / CHRIS WATTIE)
Catherine, Duchess of Cambridge and Prince George attend
Catherine, Duchess of Cambridge and Prince George attend a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016, as part of a seven-day visit to Canada focusing on indigenous and environmental issues. (Credit: EPA / STR)

ADVERTISEMENT

ADVERTISE HERE
Britain's Prince William, Duke of Cambridge and Catherine,
Britain's Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, with their children, Princess Charlotte and Prince George, attend a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016, as part of a seven-day visit to Canada focusing on indigenous and environmental issues. (Credit: EPA / STR)
Kate, Duchess of Cambridge, holds an eagle feather
Kate, Duchess of Cambridge, holds an eagle feather given to her by a young girl as Prince William, the Duke of Cambridge, looks on during a welcoming ceremony in Carcross, Yukon, Canada, on Wednesday, Sept. 28, 2016. (Credit: AP / Jonathan Hayward)
Catherine, Duchess of Cambridge, and Prince George of
Catherine, Duchess of Cambridge, and Prince George of Cambridge attend a children's party for Military families at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Pool)
Catherine, Duchess of Cambridge and Prince William, Duke
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch a cultural welcome in Carcross during their tour of Canada on on Sept. 28, 2016. (Credit: Getty Images / Chris Jackson)

ADVERTISEMENT

ADVERTISE HERE
Kate, the Duchess of Cambridge, smiles at Princess
Kate, the Duchess of Cambridge, smiles at Princess Charlotte while she plays with a toy during a children's party in Victoria, British Columbia, Thursday, Sept. 29, 2016. (Credit: AP / Jonathan Hayward)
Catherine, Duchess of Cambridge and Prince William, Duke
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive at Immigrant Services Society of BC on Sept. 25, 2016 in Vancouver, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of a weeklong visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna. (Credit: Getty Images / Andrew Chin)
Britain's Prince William, Duke of Cambridge and Catherine,
Britain's Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, with their children, Princess Charlotte and Prince George, attend a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016, as part of a seven-day visit to Canada focusing on indigenous and environmental issues. (Credit: EPA / STR)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Pool)
Prince George and Prince William attend a children's
Prince George and Prince William attend a children's party for Military families a children's party for Military families at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)

ADVERTISEMENT

ADVERTISE HERE
Prince William and daughter Princess Charlotte attend a
Prince William and daughter Princess Charlotte attend a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Pool)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Chris Jackson)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: EPA / STR)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Chris Jackson)
Kate, the Duchess of Cambridge, smiles at Princess
Kate, the Duchess of Cambridge, smiles at Princess Charlotte while she plays with a toy during a children's party in Victoria, British Columbia, Thursday, Sept. 29, 2016. (Credit: AP / Jonathan Hayward)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Pool)
Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge
Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge attend a children's party for Military families at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)
Britain's Prince William, Duke of Cambridge and Catherine,
Britain's Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, with their children, Princess Charlotte and Prince George, attend a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016, as part of a seven-day visit to Canada focusing on indigenous and environmental issues. (Credit: EPA / STR)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Pool)
Princess Charlotte attends a party at Government House
Princess Charlotte attends a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: EPA / STR)
Prince William, Duke of Cambridge and Catherine, Duchess
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, in Carcross, Yukon, Canada, on Sept. 28, 2016. (Credit: Getty Images / Pool)
Prince George of Cambridge plays with bubbles at
Prince George of Cambridge plays with bubbles at a children's party for Military families at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)
Britain's Prince William, Duke of Cambridge and Catherine,
Britain's Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, with their children, Princess Charlotte and Prince George, attend a party at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016, as part of a seven-day visit to Canada focusing on indigenous and environmental issues. (Credit: Getty Images / Chris Jackson)
Prince George attends a children's party for Military
Prince George attends a children's party for Military families at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)
Princess Charlotte of Cambridge plays with a dog
Princess Charlotte of Cambridge plays with a dog at a children's party for Military families a children's party for Military families at Government House in Victoria, British Columbia, Canada, on Sept. 29, 2016. (Credit: Getty Images / Chris Jackson)
Prince George visits the Royal International Air Tattoo
Prince George visits the Royal International Air Tattoo at RAF Fairford with his mother Catherine, Duchess of Cambridge on July 8, 2016 in Fairford, England. (Credit: Getty Images / RICHARD POHLE)
Prince William, Duke of Cambridge and Prince George
Prince William, Duke of Cambridge and Prince George during a visit to the Royal International Air Tattoo at RAF Fairford on July 8, 2016 in Fairford, England. (Credit: Getty Images / Chris Jackson)
Catherine, Duchess of Cambridge, Prince William, Duke of
Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince George during a visit to the Royal International Air Tattoo at RAF Fairford on July 8, 2016 in Fairford, England. (Credit: Getty Images / Chris Jackson)
Catherine, Duchess of Cambridge, Prince William, Duke of
Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince George sit in a Squirrel helicopter during a visit to the Royal International Air Tattoo at RAF Fairford on July 8, 2016 in Fairford, England. (Credit: Getty Images / Chris Jackson)
Britain's Princess Charlotte poses at Anmer Hall in
Britain's Princess Charlotte poses at Anmer Hall in Norfolk, England, in an undated photo released on Sunday, May 1, 2016. (Credit: Kate, the Duchess of Cambridge / Kensington Palace / AP)
Britain's Princess Charlotte poses at Anmer Hall in
Britain's Princess Charlotte poses at Anmer Hall in Norfolk, England, in an undated photo released on Sunday, May 1, 2016. (Credit: Kate, the Duchess of Cambridge / Kensington Palace / AP)
Britain's Princess Charlotte poses at Anmer Hall in
Britain's Princess Charlotte poses at Anmer Hall in Norfolk, England, in an undated photo released on Sunday, May 1, 2016. (Credit: Kate, the Duchess of Cambridge / Kensington Palace / AP)
Britain's Princess Charlotte poses at Anmer Hall in
Britain's Princess Charlotte poses at Anmer Hall in Norfolk, England, in an undated photo released on Sunday, May 1, 2016. (Credit: Kate, the Duchess of Cambridge / Kensington Palace / AP)
Britain's Prince William and Kate Duchess of Cambridge
Britain's Prince William and Kate Duchess of Cambridge enjoy a snow ball fight as they enjoy a short private break skiing in the French Alps on Thursday, March 3, 2016. (Credit: John Stillwell / Pool via AP)
Britain's Prince William poses with Princess Charlotte as
Britain's Prince William poses with Princess Charlotte as they enjoy a short private break skiing in the French Alps on Thursday, March 3, 2016. (Credit: John Stillwell / Pool via AP)
Britain's Prince William, right, and Duchess of Cambridge
Britain's Prince William, right, and Duchess of Cambridge with their children, Princess Charlotte, centre left, and Prince George, enjoy a short private break skiing in the French Alps on Thursday, March 3, 2016. (Credit: John Stillwell / Pool via AP)
Britain's Prince William and Duchess of Cambridge with
Britain's Prince William and Duchess of Cambridge with their children, Princess Charlotte, right, and Prince George, enjoy a short private break skiing in the French Alps on Thursday, March 3, 2016. This is the first time the family of four have taken a holiday together. (Credit: John Stillwell / Pool via AP)
Britain's Prince George of Cambridge on his first
Britain's Prince George of Cambridge on his first day at the Westacre Montessori nursery school near Sandringham in Norfolk, eastern England, on Wednesday, Jan. 6, 2016. The photograph of the third heir to the throne was taken by his mother Catherine, Duchess of Cambridge, as she and Prince William dropped him off for his first day. (Credit: Getty Images/ Getty Images, AFP)
Catherine, Duchess of Cambridge, Britain's Prince William, and
Catherine, Duchess of Cambridge, Britain's Prince William, and their two children Prince George and Princess Charlotte in late October 2015 at Kensington Palace in London. (Credit: Getty Images/ Chris Jelf)
Britain's Prince George on his first day at
Britain's Prince George on his first day at the Westacre Montessori nursery school near Sandringham in Norfolk, England, in a photo taken by his mother, Kate, The Duchess of Cambridge, and provided by Kensington Palace on Wednesday, Jan. 6, 2016. (Credit: AP)
Princess Charlotte, at Anmer Hall in Sandringham, England.
Princess Charlotte, at Anmer Hall in Sandringham, England. (Credit: Duchess of Cambridge via AP)
Princess Charlotte with her cuddly toy dog, at
Princess Charlotte with her cuddly toy dog, at Anmer Hall in Sandringham, England. (Credit: Duchess of Cambridge via AP)
Catherine, The Duchess of Cambridge, holding daughter Princess
Catherine, The Duchess of Cambridge, holding daughter Princess Charlotte, and Prince William, The Duke of Cambridge, carrying son Prince George in Sandringham, Norfolk, Britain on July 5, 2015. (Credit: EPA / MARIO TESTINO / ART PARTNER / HANDOUT)
Prince William, The Duke of Cambridge, carrying son
Prince William, The Duke of Cambridge, carrying son Prince George in Sandringham, Norfolk, Britain on July 5, 2015. (Credit: EPA / MARIO TESTINO / ART PARTNER / HANDOUT)
Princess Charlotte after her christening at St. Mary
Princess Charlotte after her christening at St. Mary Magdalene Church in Sandringham, England on Sunday, July 5, 2015. (Credit: AP / Chris Jackson)
Catherine, The Duchess of Cambridge (Front-C) holding her
Catherine, The Duchess of Cambridge (Front-C) holding her daughter Princess Charlotte next to her husband Prince William, The Duke of Cambridge (Front-L) with their son Prince George and Queen Elizabeth II (Front-R) in the Drawing Room of Sandringham House, Norfolk, Britain, on Sunday, July 5, 2015. In the back stand (L-R) Michael Middleton, Pippa Middleton, James Middleton, Carole Middleton, Prince Charles, The Prince of Wales and Camilla, The Duchess of Cornwall and Prince Philip, The Duke of Edinburgh. (Credit: EPA / Mario Testino)
Show More