California — Emily Blunt loves a challenge, and in the world of movie musicals there's no greater trial than following in the footsteps of Julie Andrews to bring one of her most iconic, and beloved, roles to the screen for the first time in over half a century. It's only Mary Poppins. No pressure, right? But the 35-year-old British actress has always been drawn to roles that scare her, and it's proven to be a good strategy.