Diana became anxious that Ferguson's exuberance would harm her reputation, and she started to distance herself.

The two would also confide in one another about the challenges of being a part of the royal family, Andrew Lownie said.

Royal author Andrew Lownie shared his take on what went wrong between the sisters-in-law ...

Princess Diana and Sarah 'Fergie' Ferguson were once among the closest women in the Royal Family, bound by a lifelong ...

Princess Diana and Sarah Ferguson were fourth cousins and childhood friends before they became sisters-in-law by marrying into the royal family.

On a trip to Switzerland to advocate for online child safety, the Duchess of Sussex seemed to nod to a familiar purple dress.

Prince Harry has given Meghan Markle several pieces from his mother Princess Diana's jewelry collection. Here's a look at some of the most iconic pieces she's inherited thus far.

Princess Diana reportedly became increasingly wary of Sarah Ferguson after the Duchess of York made personal remarks in her ...

Sophie, the Duchess of Edinburgh has been a central member of the royal family for years, but she didn't attend Princess Diana's funeral in 1997 — and a new book claims to unveil the real reason why.

A new book claims to unveil why Sophie, the Duchess of Edinburgh did not attend Princess Diana's royal ceremonial funeral in 1997 According to Sophie: Saving the Royal Family by Sean Smith, Sophie did ...