Today was an emotional day for those who were closest to Princess Diana.

Thursday, July 1, would've been Diana's 60th birthday. For the anniversary, Prince William and Prince Harry unveiled a statue of their mother at Kensington Palace, and they got to have a rare reunion with Diana's three siblings at the event.

Prince William, Prince Harry reunite with Diana's siblings

Today's ceremony was sparsely attended due to COVID-19, but joining William and Harry in attendance were Diana's three siblings: Lady Sarah McCorquodale, 66, Lady Jane Fellowes, 64, and Charles Spencer, 57.

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Prince William and Prince Harry greet Princess Diana's siblings at 2021 ceremony.

Ahead of the event, the Spencer siblings were seen walking outside Kensington Palace to view the public's tributes left for their late sister. They then made their way to the Palace garden, where the statue was unveiled soon after.

In the garden, the aunts of Prince Harry and Prince William were met affectionately with cheek kisses from their nephews, while Charles Spencer greeted the men with handshakes.

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Prince William and Prince Harry greet Princess Diana's sisters at 2021 ceremony.

It was a rare public reunion for the three surviving Spencer siblings. Lady Sarah and Lady Jane are the two older sisters of Princess Diana and Earl Spencer is her younger brother. Sadly, the family also had a fifth child, John, who died moments after his birth.

Today's late-afternoon ceremony marked what would've been Diana's 60th birthday. Next month, it will also have been 24 years since her tragic death at age 36 back in 1997.

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Prince William and Prince Harry greet Charles Spencer at Diana statue ceremony.

You can also click here for a recap of the ceremony and to see the moment William and Harry unveiled the statue of Princess Diana.