According to Billboard, Krumholtz will play New York journalist James Dolan, who interviews Williams. Meanwhile, Pais will play Dore Schary, the former production president of MGM who tries to persuade Williams in the direction of a film career.

DuMont will play the role of a music promoter and mayor named WB Nolan while Schmidt will play Bobbie Jett, who is the mother of Williams' daughter. She was born five days after his death.

Last month, Elizabeth Olsen was cast as Audrey Williams alongside Tom Hiddleson, who was tapped as the role of Hank Williams earlier this year.