Emma Watson was just nine when she was picked out of a line-up of would-be actors in her school gym to star in a film that would change her life in unimaginable ways. Twenty years on, her Hogwarts days far behind her, Watson is one of Britain’s most bankable stars – not to mention an influential activist lending her voice to causes like gender equality and sustainability. Ahead of her return to the screen in this December’s Little Women, the actor sat down with fellow activist Paris Lees to reflect on her extraordinary journey so far.