Composed by John Williams for Harry Potter and the Philosopher's Stone in 2001, Hedwig's Theme is named for Harry's snowy owl and became the defining musical motif of the entire film series. Its celesta led melody returned in later films and trailers, helping audiences identify the wizarding world instantly. Online, the theme spread widely as a ringtone and editing staple, reused for magic tricks, fantasy parodies, Halloween clips, and nostalgic posts. Its association with wonder and discovery keeps it popular long after the original films.