"I Walk the Line" is a song written by Johnny Cash and recorded in 1956. After three attempts with moderate chart ratings, "I Walk the Line" became the first number one Billboard hit for Cash. The single remained on the record charts for over 43 weeks, and sold over 2 million copies.
After the writing of the song Cash had a discussion with fellow performer Carl Perkins who encouraged him to adopt "I Walk the Line" as the song title. Cash originally intended the song as a slow ballad, but producer Sam Phillips preferred a faster arrangement, which Cash grew to like as the uptempo recording met with success.