"Life is a huge popularity contest," Stewart said.
There has been controversy about footwear rules at Cannes Film Festival after women in flats were allegedly denied entry to a screening in 2015.
"We will stop normalizing these horrific situations," Lawrence said.
Kristen Stewart is phenomenal as the still center of Olivier Assayas's modern ghost story.
Kelly Reichardt's film also stars Laura Dern and Michelle Williams.
The notoriously relentless critics at Cannes rounded on Olivier Assayas' film.
How a Variety video mess-up brought the Internet's wrath on Kristen Stewart.
Juliette Binoche plays a nervous and unstable actress facing her age opposites Kristen Stewart and Chloë Grace Moretz.