Michael Shannon and Jessica Chastain performed their own singing as George Jones and Tammy Wynette.
Originally, the project was conceived as a movie starring Jessica Chastain and Josh Brolin, with Tate Taylor directing. While in development, the project was transformed into a limited series, Brolin and Taylor dropped out, with Michael Shannon replacing Brolin and John Hillcoat directing all episodes.
Michael Shannon and Jessica Chastain previously played a married couple in Atormentado (2011), which also featured Katy Mixon Greer.
The second instance of Jessica Chastain playing a role previously played by Annette O'Toole who had headlined the Tammy Wynette TV biopic Stand by Your Man (1981). Chastain starred in It: Capítulo dos (2019) as Beverly Marsh, which role O'Toole had played in Eso (1990).