"When I first met Kate, I knew there was something very special about her. I knew there was possibly something that I wanted to explore there. But we ended up being friends for a while, and that was a good foundation." —Prince William, Nov. 16, 2010.

Kate Middleton and Prince William on the day of their graduation ceremony at the University of St. Andrews in Scotland on June 23, 2005

From left: Prince Harry, Prince William, and Kate Middleton cheer on the English team during the RBS Six Nations Championship match between England and Italy on Feb. 10, 2007, in London.

Prince William walks with Kate Middleton after his graduation ceremony at Royal Air Force Cranwell on April 11, 2008, in Cranwell, England.

Prince William and Kate Middleton in the State Apartments of St. James's Palace in London on Nov. 16, 2010

Prince William speaks to his bride, Kate Middleton, as she holds the hand of her father, Michael Middleton, on April 29, 2011, at Westminster Abbey in London.

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, kiss following their wedding ceremony on April 29, 2011.

The duke and duchess 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.

The duke and duchess at the London 2012 Olympic Games

"[Family's] very important to me. And I hope we will be able to have a happy family ourselves." —Kate Middleton, Nov. 16, 2010.

The duke and duchess show their newborn baby boy to the media outside London's St. Mary's Hospital on July 23, 2013.

The duke and duchess with their son Prince George in a photo released Aug. 19, 2013

The duke and duchess attend a rugby tournament in Dunedin, New Zealand, on April 13, 2014.

The duke, duchess, and Prince George visit London's Natural History Museum in this photo dated July 2, 2014.

The duke, duchess, Prince George, and Princess Charlotte in a 2015 photo supplied by Kensington Palace

The duke and duchess enjoy a break from skiing in the French Alps on March 3, 2016.

The duke and duchess take a game drive in India's Kaziranga National Park on April 13, 2016.

The duke, duchess, Prince George, and Princess Charlotte at a children’s party for military families at Government House in Victoria, British Columbia, on Sept. 29, 2016

The duke and duchess share a joke after running in a relay race at the Queen Elizabeth Olympic Park in London on Feb. 5, 2017.

The duke and duchess with their three children, Prince Louis, Princess Charlotte, and Prince George, at Anmer Hall in Norfolk, England, in this 2018 photo supplied by Kensington Palace.

The duke and duchess, with their three children, watch a flypast from the balcony of Buckingham Palace during Trooping the Colour, the Queen's annual birthday parade, on June 8, 2019.

The duke and duchess attend the Wimbledon tournament on July 14, 2019, in London.

The duke, duchess, and their three children clap for NHS carers in London on April 23, 2020, as part of The Big Night In, a charity telethon event.

The duke, duchess, and their three children in an undated Christmas card photo released on Dec. 16, 2020.

The duke and duchess visit a coronavirus vaccination center set up at Westminster Abbey in London — where they were wed in 2011 — on March 23, 2021.

The duke and duchess pose for a portrait taken at Kensington Palace this week to mark their 10th wedding anniversary on April 29, 2021.