British journalist Andrew Morton’s biography about the Princess of Wales gained No.

1 bestseller status; it gave insights into theroyal householdthat fans could only dream of.

The first formal outing for Princess Diana after getting engaged was at the Goldsmith’s Hall in 1981.

Princess Diana in engagement dress

I replied: ‘Yes, I am.’

And he said: ‘It’s black!

But only people in mourning wear black" (perInsider).

Princess Diana on red carpet

I hadn’t appreciated."

Princess Diana went on to pave the way for fashionableprincessesandduchesses.

According to theEvening Standard, royal protocol usually favors skirts (ideally on the knee) and dresses.

However, Princess Diana was often seen wearing tuxedo pants to events, suggesting trousers weren’t completely off-limits.

Similarly,Meghan Marklehas been known for wearing a suit to royal engagements.