Lin-Manuel Miranda co-stars as Jack the Lamplighter in “Mary Poppins Returns,” which has opened in movie theaters nationwide today. This is Miranda’s first co-starring role in a major motion picture, but millions already know him and his work well. Are you one of them?. Answer these 10 questions about his life and art outside Jack.

Lin-Manuel Miranda co-stars as Jack the Lamplighter in “Mary Poppins Returns,” which has opened in movie theaters nationwide today. This is Miranda’s first co-starring role in a major motion picture, but millions already know him and his work well. Are you one of them?. Answer these 10 questions about his life and art outside Jack.