The song was released on 3 November 2017 through Capitol Records, as the second single from Smith's 2017 studio album, The Thrill of It All.

[2] On 10 November 2017, "One Last Song" debuted on the UK Singles Chart at number twenty-seven, selling 13,851 copies.

[4] Smith performed "One Last Song" live during their intimate shows in Los Angeles, New York, London and Berlin in mid-September 2017.

[5] On 8 November 2017, they performed it on the Today show in the United States.

[6] The singer performed the single at The X Factor UK season 14 finale, on 3 December 2017.