Ever since a sixteen-year-old boy called Robert Peter Williams joined a boy band and was told his new name, he has been Robbie Williams. It has been twenty years now. Twenty years of singing, songwriting and performing. Twenty years of adventure, mischief, hiding and self-exposure. Twenty years of triumph, mishap, uncertainty and irrepressibility. Twenty years of searching for the right balance between growing up and gloriously refusing to grow up. ‘It's like it happened to someone else’ he says, as if he needs to remind himself that it did happen. But it really did. Here is the evidence, intimately told in his own words and pictures.