who wrote unchained melody

"Unchained Melody" was written with music composed by Alex North and lyrics by Hy Zaret. The song was originally created as a theme for the 1955 prison film "Unchained." Alex North composed the music, and Hy Zaret wrote the lyrics, though Zaret chose not to include the word "unchained" in the lyrics despite the film's title. This song became one of the most recorded and well-known songs of the 20th century.