70 Years Ago Today, Johnny Cash Recorded His First No. 1—a Song He Wrote as a Promise to His First Wife

On this day (April 2) in 1956, Johnny Cash stepped into the Sun Studio in Memphis, Tennessee, to record “I Walk the Line.” Later that year, it became his first No. 1 single. Cash wrote the song as a promise to his first wife, Vivian Liberto. He hoped the song would assure her that he would remain faithful while on tour.

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“I Walk the Line” came early in Cash’s career. When he recorded the song, he had only released two singles, both of which had been hits. His debut single, “Cry! Cry! Cry!,” peaked at No. 14. He followed that with “So Doggone Lonesome,” which reached No. 4. His first No. 1 kicked off a string of hits that included “There You Go,” “Home of the Blues,” “Ballad of a Teenage Queen,” and “Guess Things Happen That Way,” among others.

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The Stories Behind Johnny Cash’s First No. 1

Some details have been muddled in the seven decades since Johnny Cash wrote “I Walk the Line.” According to Songfacts, he even had trouble keeping the details straight. There are, however, a few things we know for sure.

First and foremost, Cash wrote the song for his first wife, Vivian Liberto. His career was starting to take off, and he was touring with Elvis Presley, his labelmate and a rising star who drew large crowds of young women and girls. The song was a public promise to be faithful while on the road.

While serving in the Air Force, Cash was in a band called the Landsberg Barbarians. They recorded some songs on a reel-to-reel tape recorder. One evening, he began listening to the tape, but it was backwards. The result “sounded like spooky church music.” That was the inspiration for the song’s chord progression and melody.

His bassist, Marshall Grant, remembers the song coming together in March 1956. He was playing slow bass runs before a show in Longview, Texas, when Cash started humming a melody. Grant recalled that Cash started with the line “I keep a close watch on this heart of mine,” and finished writing it that evening.

In his first autobiography, Cash recalled writing the song before a 1955 show in Shreveport, Louisiana. His next autobiography puts the birth of “I Walk the Line” in 1956 before a show in Gladewater, Texas. In the second recollection, he was working on the song’s lyrics when Carl Perkins suggested the song’s title.

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