《Once Upon a Time》 is a song by the French duo Air and is the second track on their 2007 studio album 《Pocket Symphony》. The radio edit version of the song was released as the first single from that album in January 2007 via digital download stores. A limited edition CD, with a production run of 700, was released in France on March 12, 2007 with the radio edit, the album version and B-side 《High Point》. On that same day, a 7-inch vinyl record featuring the radio edit and 《High Point》 was released in the United Kingdom.