John Herndon Mercer was an American lyricist, songwriter, and singer. He was also a record label executive who co-founded Capitol Records with music industry businessman Buddy DeSylva and Glenn E. Wallichs.
He is best known as a Tin Pan Alley lyricist, but he also composed music. He was also a popular singer who recorded his own songs as well as songs written by others. From the mid-1930s through the mid-1950s, many of the songs Mercer wrote and performed were among the most popular hits of the time. He wrote the lyrics to more than 1,500 songs, including compositions for movies and Broadway shows. He received nineteen Academy Award nominations, and won four Best Original Song Oscars.