What began 20 years ago as a dozen 12-year-olds in our parents' living room has become a movement of over three million young people around the world. Whether it's the environment or knife crime, homelessness in their hometown or poverty overseas, we've learned that young people want to make a difference.
Stars including Ellie Goulding, Dizzee Rascall and Jennifer Hudson are already beginning to arrive for today's #WeDay at