Glen Gray (1900-1963) was an American saxophonist, bandleader, and arranger. He rose to prominence leading the Casa Loma Orchestra, a highly successful big band known for its precise, swinging arrangements and sophisticated sound. Gray's arrangements often featured intricate section work and a strong melodic focus, contributing significantly to the development of the "sweet" band style within the swing era. His meticulous approach to orchestration and commitment to musical excellence left a lasting mark on jazz and popular music.