Siblings who grew up above the family store in Paris. They learned their trade from learned from their grandfather who founded the company and their father who remains as Chairman and guiding light. Jean Cassegrain and Sophie Delafontaine have brought in Kate Moss, Tracy Emin, Alexa Chung, Hood By Air’s Shayne Oliver and now Kendall Jenner, so they’re quietly getting radical. Hear their secrets and some fabulous French accents