As the longest-serving British monarch in history, Queen Elizabeth II has had countless regal moments over the past six decades, and her late husband, Prince Philip, was by her side the entire time.
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Queen Elizabeth's 90th Birthday
Ten thousand guests gathered on The Mall to celebrate the queen's 90th year, as well as her patronage of more than 600 charities and organizations.
Trooping the Colour 2016
In 2016, the annual Trooping the Colour celebration coincided with the queen's 90th birthday and also marked Princess Charlotte's first public appearance. The Queen looked smashing in a vibrant green coat and dress by Stewart Parvin and matching hat by Rachel Trevor Morgan.
Princess Charlotte's Christening
The proud great-grandparents looked on at the christening of Prince William and Duchess Kate Middelton's daughter, Charlotte, on July 5, 2015.
Prince Philip's 90th Birthday
Celebrations marking Prince Philip's 90th birthday included a reception and dinner at Fishmongers' Hall on June 28, 2011.
World War I Remembrance
In 2008, the queen and prince observed the 90th anniversary of the end of the First World War during a Sunday service at the Cenotaph.
The queen and prince hopped aboard the Royal Barge Spirit of Chartwell on June 3, 2012, as they commemorated Queen Elizabeth's 60th year on the throne.
Solidifying U.S.-British Relations
In the '80s, the royal couple became friendly with President Ronald Reagan and First Lady Nancy Reagan. In 1982, they posed together at Windsor Castle before taking part in a formal state dinner.
Remembering Princess Diana
After Princess Diana's death in 1997, Queen Elizabeth and Prince Philip put on a brave face for the country, which was still in mourning. The couple showed their appreciation to the thousands who left flowers outside of Kensington Palace in memory of the late princess.
After her father, King George VI, died of cancer in 1952, Elizabeth inherited the throne at just 25. During the June 1953 coronation ceremony, Prince Philip knelt in homage to his wife, the new queen.
The then princess said "I do" in 1947 at 21 years old. Prince Philip was 26. The couple would go on to have four children together: Charles, Anne, Andrew and Edward.