The strict dress code which means movie stars are always immaculately turned out was stepped up for the screening of Carol, a pro-LGBT romance starring Cate Blanchett and Rooney Mara, and resulted in many being turned away for donning unacceptable footwear.
Senna director Asif Kapadia, whose Amy Winehouse documentary Amy was screened during the festival, tweeted that his wife had received similar treatment, but was eventually let in.
A number of women were turned way from the premier for wearing “rhinestone flats” according to Screen Daily – even though some of them were reported to have medical conditions.
Cannes declined to comment on the matter to Screen, but did say it is mandatory for women to wear high heels at red carpet screenings.
Many male stars appearing at the event have stated that they are going to wear heels on the red carpet to shine a light on the ruling.