Hedwig's Theme was composed by John Williams for the first Harry Potter film, Harry Potter and the Philosopher's Stone, released in 2001, and it has since become the musical signature of the whole wizarding series. Its opening notes are recognised worldwide, even by people who have never seen the films. Simple instrumental versions, especially on flute, have spread widely online because the melody is a popular choice for music students and for creators who want an instantly magical cue. In Spanish-speaking searches it is often looked for as 'flauta', reflecting its use in school music lessons and fan videos.