Halle Berry revealed that she was going to wear a Gaurav Gupta dress to the Cannes Film Festival opening gala on May 13, but had to switch her dress due to the festival's rule that prohibits dresses with a long train.

The "Monster's Ball" actor revealed exactly which part of her dress made her look ineligible for the red carpet.

Halle Berry is one of the many A-list celebrities descending upon Cannes, France, for the annual film festival. She wore a stunning Celia Kritharioti ensemble that featured a high-low bubble skirt and this rule-breaking detail.