"Heartlight" is a song written by Neil Diamond, Carole Bayer Sager and her then-husband Burt Bacharach, and recorded by Diamond in 1982. The song is the first track on Diamond's 1982 album, also titled Heartlight, and reached #5 on the Billboard Hot 100, becoming his eighth (and last) top 5 hit on the chart. The song also spent four weeks atop the adult contemporary chart in late 1982, and was the last of his eight #1s on that chart.
The song is inspired by the blockbuster movie E.T. the Extra-Terrestrial, which Diamond, Bayer Sager and Bacharach had all seen together. When the alien E.T. leaves Earth, his heart glows a luminous red, hence the title of the song.
The songwriters were required to pay Universal Studios $25,000 for the use of ideas from the film.