Watch: Bob Dylan and Johnny Cash duet on Hank Williams song backstage in Cardiff

May 11th, 1966 - Bob Dylan performed at the Capitol Theatre in Cardiff, Wales. Johnny Cash was also on tour in the United Kingdom at the time, performing the same night in Cardiff.

Backstage at the Capitol Theatre Cash and Dylan played some songs together, just before Dylan was due to go onstage.

Watch below as Dylan and Cash play Hank Williams' "I'm So Lonesome I Could Cry."

And below, watch Cash and Dylan play Johnny Cash's 1958 song, "I Still Miss Someone."