James "Jimmy" Dorsey (February 29, 1904 - June 12, 1957) was a prominent American jazz clarinetist, saxophonist, trumpeter, composer, and big band leader. He was known as "JD". He composed the jazz and pop standards "I'm Glad There Is You (In This World of Ordinary People)" and "It's The Dreamer In Me". Overview Jimmy Dorsey was born in Shenandoah, Pennsylvania, the son of a music teacher and older brother of Tommy Dorsey who also became a prominent musician. He played trumpet in his youth, appearing on s...