On the recommendation of his friend Steven Spielberg, Lucas hired composer John Williams. Williams had worked with Spielberg on the film Jaws, for which he won an Academy Award. Lucas believed that the film would portray visually foreign worlds, but that the musical score would give the audience an emotional familiarity; he wanted a grand musical sound for Star Wars, with leitmotifs to provide distinction. Therefore, he assembled his favorite orchestral pieces for the soundtrack, until Williams convinced him that an original score would be unique and more unified. However, a few of Williams's pieces were influenced by the tracks given to him by Lucas: the "Main Title Theme" was inspired by the theme from the 1942 film Kings Row, scored by Erich Wolfgang Korngold; and the track "Dune Sea of Tatooine" drew from the soundtrack of Bicycle Thieves, scored by Alessandro Cicognini.
In March 1977, Williams conducted the London Symphony Orchestra to record the Star Wars soundtrack in 12 days. The original soundtrack was released as a double LP in 1977 by 20th Century Records. 20th Century Records also released The Story of Star Wars that same year, a narrated audio drama adaptation of the film utilizing some of its original music, dialogue, and sound effects. The American Film Institute's list of best film scores ranks the Star Wars soundtrack at number one.