Share Tweet Pin Email By Molly Claire Goddard 2:03pm PDT, Sep 30, 2025 _ Kate Middleton and Sophie, Duchess of Edinburgh, have become close confidants. According to a royal expert, the Princess of Wales and Prince Edward's wife maintain a tight bond as they navigate life as mothers and working members of the royal family.Keep reading for more on their friendship...MORE: Follow Wonderwall on MSN for more top news _ Sophie, Duchess of Edinburgh, became a member of the royal family when she wed Prince Edward, the youngest of Queen Elizabeth II and Prince Philip's children, in 1999.