This isn't the first time Stewart has taken a stand (literally) against the dress code.
'Heelgate' began in 2015 when 50 women were not allowed to watch 'Carol' because they weren't wearing heels.
When speaking out about this issue in 2016 Stewart told Indiewire"things have to change immediately. It has become really obvious that if [a man and I] were walking the red carpet together and someone stopped me and said, 'Excuse me, young lady, you're not wearing heels. You cannot come in.' Then [I'm going to say], 'Neither is my friend. Does he have to wear heels?' It can work both ways".
Many on Twitter applauded Stewart for going barefoot this year.