Lili Boulanger was a French composer and musician, the first woman to win the Prix de Rome for composition in 1913 with her cantata Faust et Hélène. She was the younger sister of Nadia Boulanger, a celebrated composer and teacher, and the daughter of composer Ernest Boulanger. Lili showed remarkable musical talent from an early age, absorbing Conservatoire-level learning while accompanying Nadia to lessons. Unfortunately, chronic illness disrupted her education and shortened her life. She studied at the Paris Conservatoire, supported by Nadia. In 1912, Lili attempted the Prix de Rome but collapsed during performances. In 1913, at nineteen, she won first prize, a landmark achievement for women in music. During World War I, she and Nadia organised support for soldiers and Conservatoire networks. Lili’s musical style features lush harmony and sensitive orchestration, blending influences from composers like Fauré and Debussy. Key works include Faust et Hélène, Psaume 130, and Pie Jesu. Her legacy continues through the Lili Boulanger Memorial Fund, promoting women composers and recognising her contributions to music history.