Kate Middleton and Sophie, Duchess of Edinburgh Share a ‘Sisterly Bond’: ‘Sophie Is Like the Older Sister Kate Never Had’

Royal biographer Ingrid Seward says the two women “have a huge amount in common”

Max Mumby/Indigo/Getty Catherine, Princess of Wales and Sophie, Duchess of Edinburgh attend the annual National Service of Remembrance at The Cenotaph on Nov. 10, 2024 in London, England

Max Mumby/Indigo/Getty

Catherine, Princess of Wales and Sophie, Duchess of Edinburgh attend the annual National Service of Remembrance at The Cenotaph on Nov. 10, 2024 in London, England

It was evident in their joint appearance at Remembrance Sunday that Kate Middleton and Sophie, Duchess of Edinburgh share a bond.

On Nov. 10, in what marked day two of the Princess of Wales’ first back-to-back days of royal appearances throughout all of 2024, Sophie put a nurturing, protective hand on Kate’s back as the two women left the balcony and walked into the Foreign, Commonwealth and Development Office after observing the service at The Cenotaph war memorial below. It was an unspoken show of support and reassurance towards Kate, 42, by Sophie, 59, who has been married to Prince Edward for 25 years.

Royal biographer Ingrid Seward told Hello! that the two women “have a sisterly bond, and Sophie is like the older sister Kate never had.”

Related: How the Royal Family Rallied Around Kate Middleton During Her Public Return: 'It Was Protective' (Exclusive)

Henry Nicholls - WPA Pool/Getty Images Catherine, Princess of Wales (L) and Britain's Sophie, Duchess of Edinburgh (R) react as they arrive at St George's Chapel to attend the Most Noble Order of the Garter Ceremony in Windsor Castle in Windsor, on June 19, 2023

Henry Nicholls - WPA Pool/Getty Images

Catherine, Princess of Wales (L) and Britain's Sophie, Duchess of Edinburgh (R) react as they arrive at St George's Chapel to attend the Most Noble Order of the Garter Ceremony in Windsor Castle in Windsor, on June 19, 2023

Calling the two women “incredibly kind girls,” Seward added, “They are both protective of their children. Sophie has had a young family, so she knows what it’s like trying to protect them while being in the royal world.”

Sophie and Edward, the youngest child of the late Queen Elizabeth and Prince Philip, share daughter Lady Louise, 21, and son James, Earl of Wessex, 16. Kate and Prince William are parents to Prince George, 11, Princess Charlotte, 9, and Prince Louis, 6. Of the Duchess of Edinburgh, Seward added, “She has been there in the background [for Kate] as part of a private support network.”

“The royals have always shown a human side, but there is more warmth now,” Seward continued. “That gesture of Sophie putting her arm around Kate is something you wouldn’t have seen a few years ago.”

Chris Jackson/Getty Catherine Princess of Wales and Sophie, Duchess of Edinburgh stand from the balcony during the National Service of Remembrance at The Cenotaph on Nov. 10, 2024 in London, England

Chris Jackson/Getty

Catherine Princess of Wales and Sophie, Duchess of Edinburgh stand from the balcony during the National Service of Remembrance at The Cenotaph on Nov. 10, 2024 in London, England

Fellow royal biographer Robert Jobson told Hello! “That moment said a lot. The royal family are all looking after Kate, and there is a protective bubble around her.”

Seward said Kate and Sophie “have a huge amount in common, having probably formed a bond very much at the beginning. Sophie was there for Kate in an unofficial capacity because she had the same experience of being a commoner marrying into the royal family. They both had really long romances with their husbands-to-be, and Sophie lived at [Buckingham] Palace. By the time they got married, they had more knowledge than the royal brides before them about what they were getting into.”

TOBY MELVILLE/POOL/AFP via Getty Images Sophie, Countess of Wessex (L) and Catherine, Duchess of Cambridge (R) attend the Most Noble Order of the Garter Ceremony at St George's Chapel in Windsor Castle, in Windsor, west of London on June 13, 2022
TOBY MELVILLE/POOL/AFP via Getty Images Sophie, Countess of Wessex (L) and Catherine, Duchess of Cambridge (R) attend the Most Noble Order of the Garter Ceremony at St George's Chapel in Windsor Castle, in Windsor, west of London on June 13, 2022

Related: Sophie, Duchess of Edinburgh Follows Kate Middleton's Lead with Rare Media Appearance

The two also live nearby one another, the Princess of Wales at Adelaide Cottage on the Windsor Estate and the Duchess of Edinburgh at Bagshot Park, also in Windsor.

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“[Sophie] is 17 years older than Kate, and has seen and done it all before,” royal biographer Claudia Joseph previously told The Sun. “She [Kate] has found that Sophie is a true confidante and sounding board, and they have developed a mutual respect and an unbreakable bond.”