Clair de Lune by Claude Debussy is a lovely piano tune that even had a cameo appearance in Twilight. When Claude Debussy was just 28 years old, he began creating the immensely beautiful piano composition Clair de Lune. It didn't come out for another 15 years! His inspiration for this piece came from a real-life romance he had when he was 19 years old. The girl's name was Marie d'Agoult and she was married to a man named Gustave d'Eynard. They met while Debussy was working as a music critic for the newspaper La Revue Musicale. In addition to being one of the most popular piano pieces ever written, Clair de Lune has been used in many films, including but not limited to: Twilight, Harry Potter and the Sorceror's Stone, The Emperor's New Groove, and Titanic. There are several versions of the song, but none can compare to the original version composed by Claude Debussy. He first performed it on May 31, 1902 at the Paris Conservatoire where it received an enthusiastic response from his audience. After that, he continued to add notes to the piece until it finally reached its current form. The main theme of the song is a simple melody played over a backbeat on the piano. However, there are other elements included in the composition which make it more than just a simple melody played on the piano.