Johnny Cash (February 26, 1932–September 12, 2003), born J. R. Cash, was an American singer-songwriter and one of the most influential musicians of the 20th century. Primarily a country music artist, his songs and sound spanned many other genres including rockabilly and rock and roll (especially early in his career), as well as blues, folk and gospel.

Cash was known for his deep, distinctive bass-baritone voice, the "chicka-boom" freight train sound of his Tennessee Three backing band, his demeanor, and his dark clothing, which earned him the nickname "The Man in Black". He traditionally started his concerts with the introduction "Hello, I'm Johnny Cash".

Much of Cash's music, especially that of his later career, echoed themes of sorrow, moral tribulation and redemption. His signature songs include "I Walk the Line", "Folsom Prison Blues", "Ring of Fire", "Get Rhythm" and "Man in Black". He also recorded humorous songs, such as "One Piece at a Time" and "A Boy Named Sue", a duet with June Carter called "Jackson", as well as railroad songs such as "Hey Porter" and "Rock Island Line."