Willie Nelson released 'Bluegrass' on September 15, 2023. The album reinterprets classic Nelson songs in a bluegrass style, with acoustic arrangements. It was again produced by Buddy Cannon.
The album includes bluegrass versions of Nelson hits such as 'On the Road Again', 'Mammas Don't Let Your Babies Grow Up to Be Cowboys', and 'Blue Eyes Crying in the Rain'. Recording featured bluegrass specialists like fiddler Stuart Duncan and banjoist Ron Block.
The album was well received by critics, who praised the reinvention of Nelson's classics. It reached number 1 on the Billboard Bluegrass Albums chart and number 38 on the Top Country Albums chart.