Joseph Kosma (October 22, 1905 – August 7, 1969) was a Hungarian-French composer, of Jewish background.
Kosma was born József Kozma in Budapest, where his parents taught stenography and typing. He had a brother, Akos. A maternal relative was the photographer László Moholy-Nagy, and another relative was the conductor Georg Solti. He started to play the piano at age 5, and later took piano lessons. At the age of 11, he wrote his first opera, Christmas in the Trenches. After completing his education at the Gymnasium Franz-Josef, he attended the Academy of Music in Budapest, where he studied with Leo Weiner. He also studied with Béla Bartók at the Liszt Academy. He earned diplomas in composition and conducting. He won a grant to study in Berlin in 1928. There, he met Lilli Apel, another musician, whom he later married. Kosma also met and studied with Hanns Eisler in Berlin. He also became acquainted with Bertolt Brecht and Helene Weigel.
Kosma and his wife emigrated to Paris in 1933. Eventually, he met Jacques Prévert, who introduced him to Jean Renoir. During World War II and the Occupation of France, Kosma was placed under.