That’s whenCatherine appeared in a risque transparent dressfor a charity fashion show at St. Andrews University.

Was it to show the prince what he was missing?

We’ll never know for sure.

Kate Middleton in 2012

Her time working for Jigsaw also played a large role in developing what would become her signature fashion style.

Gone were the bare shoulders, short skirts, slouchy jeans, and clunky shoes.

Catherine ramped up her wardrobe with expertly tailored looks, monochromatic colors, and an enviable selection of handbags.

Woman adjusts sheer Kate Middleton dress

The outlet specifically gave a nod to this Order of the Garter outfit and Philip Treacy hat.

Before long, the dress sold out and brands launched copycat dresses around the world.

She knows how to let her hair down, so to speak, when appropriate.

Kate Middleton at St. Andrews in 2005

But there’s more to Catherine’s stunning array of hats and fascinators than just looking stylish.

One of the looks that Catherine has been snapped in repeatedly is in an A-line silhouette for her dresses.

Catherine is also known for keeping shoes for a long time.

Kate Middleton, Prince Harry at Order of the Garter, 2008

Her famous Penelope Chilvers Long Tassel Boots still make a frequent appearance on her feet.

The look was designed once again by fashion house Alexander McQueen.

On a 2022 visit to Lambrook School, she wore this polka-dot dress by Rixo.

Kate Middleton smiling at Royal Charity Polo Cup

For instance, she wore this Alexander McQueen dress during a 2016 visit to Canada.

But her impeccable travel style comes down to another set of royal family rules centered around travel.

Kate Middleton, 2012 and 2019, Lock & Co hat

Kate Middleton with Prince William

Kate Middleton and Prince William at BAFTAs

Kate Middleton with family on balcony

Kate Middleton and Prince William in Boston, 2022

Royal family on way to Lambrook School

Kate Middleton smiling

Kate Middleton smiling

Kate Middleton and Prince William smiling in Canada