Like the characters he often portrays, Bill Murray plays by his own rules and the stories about him are many and legendary. For a while he was prone to sneaking up behind strangers in the street, covering their eyes and when they turned to see who it was he’d smile and say: “No one will ever believe you.” At the Berlin premiere of The Grand Budapest Hotel he got out of the car holding a full martini glass which he then downed in one gulp. His surprise cameo appearances over the years have included singing karaoke in bars, gatecrashing parties, some impromptu bartending and casual party going. He is a very endearing figure, and definitely a man worth having a whole day devoted to him by a film festival.