It was raining, so the Cannes Film Festival jury member had to courageous a soggy red carpet to stage her silent protest against an alleged rule that women must wear high heels to gain entrance to the posh event's movie screenings.
Cannes Film Festival rules maintain that women at gala premieres must wear heels and not flats, while men must wear a black tie.
Stewart isn't the first person to take her shoes off on the red carpet since then, with Julia Roberts going barefoot at Cannes in 2016 at the premiere for Money Monster.
That's when Danish producer Valeria Richter had trouble gaining entry to a screening because she was wearing-gasp!-non-high-heeled shoes.
Last year, Stewart - who's been known to wear trainers with dresses on the red carpet - spoke about the event's fashion rules.
Although several Twitter users applauded Stewart's rebellious move, others criticized her for what they viewed to be a small gesture in a serious, ongoing debate for women's rights.
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Even though multiple Cannes officials have denied that the high heel policy exists, Kristen Stewart seemingly believes that it does. "It can work both ways". It's just like you simply can not ask me to do something that you are not asking him [to do].
"If you're not asking guys to wear heels and a dress, you can't ask me either", she stated emphatically at the time.
Kristen Stewart is such a rebel and she recently took it to an global level.
Lebanese actress Manal Issa raised a sign which said "stop the attack on Gaza" while walking the Cannes Film festival red carpet to draw attention to the Israeli army's killing of Palestinians on the Gaza border a day earlier.
In 2015, it was reported Cannes had implemented a heels-only policy.
Kristen Stewart walked barefoot on the red carpet.