American country singer Johnny Cash with his wife June Carter photographed in a London park during their visit to Britain, a few weeks after their wedding. 3rd May 1968. (Photo by Ley, Charlie/Mirrorpix/Mirrorpix via Getty Images)
(Original Caption) New York: Singer Johnny Cash performs during a recent concert at Madison Square Garden. The performer is currently on top of the country and western charts, his most notable achievements being recorded performances for inmates of Folsom, and San Quentin prisons. 12/11/1969 (Photo by Bettmann/Getty Images)
LOS ANGELES – 1968: Married country singers Johnny Cash and June Carter Cash perform onstage in 1968 in Los Angeles, California. (Photo by Michael Ochs Archives/Getty Images)
circa 1975: Profile of American country singer Johnny Cash (1932 – 2003), wearing a tuxedo, playing an acoustic guitar, in a promotional still for the 11th annual Country Music Association Awards which Cash hosted at the Grand Ole Opry, Nashville, Tennessee. (Photo by CBS Photo Archive/Getty Images)
American country and western singer-songwriter Johnny Cash (1932 – 2003) and his wife June Carter Cash (1929 – 2003) as Sheriff Lamar Potts and Mayhayley Lancaster in the TV movie 'Murder in Coweta County', directed by Gary Nelson, 1983. (Photo by Silver Screen Collection/Getty Images)
