Invite to Cannes Film Festival

Ages ago I met a film maker online, he asked if he could use my composition ‘I Won’t Ask’ (track 1 on my album The Magical Mirror) to back a montage in his upcoming feature film called Samuel Street – I agreed and thought little more of it, as so many ambitious plans fail to come to fruition in our respective creative industries…  Approximately 6 years later, I discover that his film is to premier at Cannes this year (2016) and I am invited to join the cast and crew on the red carpet!  What should I wear?