Irwin Kostal was an American musical arranger of films and an orchestrator of Broadway musicals.
After moving to New York City, Kostal was hired for Sid Caesar's popular variety series Your Show of Shows, and followed this with a stint at The Garry Moore Show.
In the latter part of the decade he began working on Broadway, orchestrating for Shinbone Alley, The Music Man, Fiorello!, and West Side Story. His work on the latter resulted in his being hired to score the 1961 screen adaptation with Saul Chaplin, Johnny Green, and Sid Ramin. The quartet won both an Oscar and a Grammy Award for their contributions. Kostal later went on to collaborate with Saul Chaplin for the 1965 film adaptation of the Rodgers & Hammerstein musical The Sound of Music and won an Oscar for Best Music Scoring.
He also conducted the orchestra for several of the Firestone Christmas Albums.
