According to royal biographer Ingrid Seward, Princess Kate shares a "sisterly bond" with Sophie, Duchess of Edinburgh. Read more about their sweet relationship, here.

The Duchess of Edinburgh attended a special charity event on Monday, marking the 60th anniversary of Wellbeing of Women at ...

The “sisterly bond” between Kate Middleton and Sophie, Duchess of Edinburgh was on full display for Remembrance Sunday on Nov ...

The Duchess of Edinburgh was all smiles as she attended a charity event on Monday in her role as patron of Wellbeing of Women ...

Their storied beginning seemed to go south just ahead of their 2018 wedding, but Kate Middleton and Sophie, Duchess of ...

The Duchess of Edinburgh, Sophie, has made a public appearance shortly after her daughter, Lady Louise Windsor, celebrated ...

Duchess Sophie, who's the royal family's secret weapon, put on a stylish display as she stepped out in Hounslow days after ...

As the Princess of Wales turned to leave the annual Service of Remembrance on Whitehall after making a poignant return to ...

Here's who Prince Edward's wife, Sophie, was seen helping after they fainted while standing on a balcony watching a memorial ...

To royal author Tina Brown, William sounded ‘like a performative pinhead’ while discussing his plans for a more ’empathetic’ ...

And, most recently, his wife Kate Middleton seemingly showed her very own stamp of approval over his new look. According to ...

Duchess Sophie’s skinny jeans weren’t the only thing that caught my attention during the royal’s latest outing. The duchess ...