Lucien Cailliet (1891-1985) was a French composer and arranger, renowned for his contributions to orchestral music, particularly in the realm of film scoring and jazz. His work primarily spanned the early to mid-20th century, during which he became well-known for his innovative orchestration techniques. Cailliet is best remembered for his arrangements of classical works, notably the "Concerto for Jazz Band" and his orchestration of "The Rite of Spring" by Igor Stravinsky, which he adapted for concert band. His arrangements helped bridge the gap between classical and popular music, making complex works more accessible to wider audiences. Additionally, Cailliet's influence extended into the film industry, where he worked on scores for various movies, blending classical elements with contemporary styles. His ability to incorporate jazz influences into classical frameworks showcased a unique versatility that impacted both genres. Cailliet's legacy endures through his arrangements and compositions, which continue to be performed by orchestras and ensembles, demonstrating his lasting impact on the evolution of music in the 20th century.