Behind the scenes at the Cannes Film Festival: DON'T YOU KNOW WHO I AM? Security is so tight at the festival this year that the star of the new Coen Brothers movie Oscar Isaac was briefly locked out of his own premiere. "I went out to take a piss and they wouldn't let me back in, I missed the first half hour of the film!" Isaac, who sings and plays guitar in the bleakly comic film about a folk singer in 1960s New York, was heard complaining at the after-show party. CONTROVERSY ALERT!