David Ari Leon (born December 12, 1967) is an American composer, musician and music supervisor. He is best known for writing and supervising music for Marvel Entertainment on titles such as Spider-Man and Incredible Hulk. Leon is a songwriter on the themes to the Marvel series Avengers and Super Hero Squad, and he composed the main title music to the shows Xyber 9 and Mr. Bill Presents. Leon was featured as a musician on NPR's syndicated program Morning Edition in five episodes between the years 2005 to 2010. Read more on Last.fm