Darlene Love and her group, the Blossoms, sang backup vocals on the track. Fabares is quoted in "The Billboard Book of Number One Singles" by Fred Bronson as saying she was intimidated by Love's group and their "beautiful" voices and was terrified at the prospect of becoming a recording artist, as she did not consider herself a singer, but was expected to sing on the show anyway. The song also featured an echo chamber, where the intro of the repeated title words: "Johnny Angel, Johnny Angel" was used by Fabares and the backup singers. Musicians who played on the track include Hal Blaine on drums, Carol Kaye on bass and Glen Campbell on guitar.