"They have a sisterly bond and Sophie is like the older sister Kate never had," royal author and commentator Ingrid Seward told Hello! of the royal duo. Sophie, the Duchess of Edinburgh, married Prince Edward in 1999 and shares two children, Lady Louise and James, the Earl of Wessex, with the Duke of Edinburgh.

Royal biographer Ingrid Seward says the two women “have a huge amount in common” It was evident in their joint appearance at Remembrance Sunday that Kate Middleton and Sophie, Duchess of Edinburgh share a bond.

Catherine, Princess of Wales has always been a big sister figure. She was one year old when her little sister, Pippa Middleton, came along, and five when her baby brother, James Middleton, was born. Their relationship with one another only seems to have strengthened as they've entered the public eye,

Princess Kate and the Duchess of Edinburgh were given "more knowledge" before making a key move, a royal commentator has claimed. Kate, 42, and Sophie, 59, both married into the Royal Family from middle-class backgrounds and have young children,