The “sisterly bond” between Kate Middleton and Sophie, Duchess of Edinburgh was on full display for Remembrance Sunday on Nov. 10, and royal biographer Ingrid Seward said Kate considers Sophie the older sister she never had.

The Duchess of Edinburgh attended a special charity event on Monday, marking the 60th anniversary of Wellbeing of Women at PwC's offices in London. In her role as patron of the women's health charity,

But Sophie's warm gesture demonstrated the sisterly closeness between the two royal women, and one which revealed just how much the royals have wrapped a protective arm around sto

Sophie, the Duchess of Edinburgh may be a mentor to Kate Middleton in royal duties, but the duchess just took a style cue from the princess by wearing one of Middleton's go-to winter outfit formulas.