The Cannes Film Festival is one of the most prestigious events in cinema.

But in addition to the festival’s official dress code, there are some unwritten rules.

That’s why you almost never see Hollywood’s leading ladies wearing flats at Cannes.

Kristen Stewart sunglasses

Over the years, however, a rebellious few have bucked this tradition.

In 2018, Kristen Stewart famously took off her stiletto heels towalk the Cannes red carpet barefoot.

Stewart did something similar at the 2016 festival, ditching her heels for a pair of Vans.

Jane Fonda standing on Cannes Film Festival red carpet in front of photographers

That same year, Julia Roberts and Sasha Lane skipped shoes and were barefoot for some Cannes festivities.

However, this was less of a statement, and more of a misunderstanding.

“I had no clue.

My shoes were a size too big.”

What does the Cannes rulebook say about women’s shoes?

In response, the festival issued a statement toBBC, claiming that such a rule did not exist.

So while formal wear is obviously expected, nice flats are now officially fair game.

That said, the dress code also says, “Trainers [i.e.

sneakers] are forbidden.”