The actress struck a pose in the sunshine wearing a burgundy lace-up Versus mini dress which featured straps criss-crossing across her sides, shoulders and back.
Statement heels and natural wavy locks completed the on-trend ensemble.
Diane was joined at the photo call by her fellow jury members Jean-Paul Gaultier and Ewan McGregor.
What a stylish trio they make. WE WISH WE WERE THERE.