Though Spacek had started out as a singer, the producers considered dubbing Loretta's vocals over her performance. Lynn encouraged them to allow Spacek to do all of her own singing in the film and helped the actress learn to sing and play guitar in her style. The film's soundtrack featured Spacek's singing all of Lynn's hits sung in the movie, including "Coal Miner's Daughter".
Truly a "tour de force" for Ms. Spacek, for which she won the Best Actress Oscar that year.