Marie-Juliette Olga Lili Boulanger was a French composer, the younger sister of the noted composer and composition teacher Nadia Boulanger. A Parisian-born child prodigy, Boulanger's talent was apparent at the age of two, when Gabriel Fauré, a friend of the family and later one of Boulanger's teachers, discovered she had perfect pitch. Her parents, both of whom were musicians, encouraged their daughter's musical education.