Princess Diana owned a wardrobe fit for royalty. Kate Middleton inherited much of her collection, but she might have missed out on this one signature accessory.

Check out a video of Prince William using an old nickname for his wife, which he never uses these days, over and over again.

Roya Nikkhah, royals editor for The Sunday Times, told Fox News Digital that the Prince and Princess of Wales have a strong marriage filled with affection.

It wouldn't be a royal wedding without impeccable and elaborate multi-tiered cakes, even if one at Kate Middleton and Prince William's wedding caused drama.

“She’s doing well,” William told The Times, referring to his wife and her health. Kate has started to make her slow return to public duties, even attending the National Service of Remembrance ceremony in London on Sunday alongside other senior members of the royal family.

The Prince and Princess of Wales have been married for more than a decade and share three children - and it seems they have a secret to their happy marriage

When it comes to their religious faith, Prince William and Kate Middleton seem to have different viewpoints, especially after Kate's cancer diagnosis.

EXCLUSIVE: We took a walk down memory lane with royal expert Pauline Maclaran to ask her about the best kept secret in the UK.